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If there's more than one, and you don't care which one, then it's "a". If you care which one then it's "the". "Pass me a plate" - any plate will do. "Pass me

If there's more than one, and you don't care which one, then it's "a". If you care which one then it's "the". "Pass me a plate" - any plate will do. "Pass me the plate" - I want the specific plate which we were talking about.

layer8 13d ago
That rule isn’t universal though. “I go to the dentist every year” doesn’t imply that I particularly care about a specific dentist (or, case in point, about the specific dentist). “This was a nice evening” is also difficult to characterize as not caring about which evening it is. As are books titled “An Introduction to XYZ”, where both the authors and the readers will probably care about the specific book.
- rawling 13d ago
  I'm going to the bank, the shop, the dentist, the pool - I have a regular one in mind and you may well also know which one I mean. I'm going to a bank, a shop, a dentist - I've found a new one and I may well be about to describe it to you. "A nice evening" - there have been ones before, there hopefully will be again, this was one of them.
  - layer8 13d ago
    Sure, but that’s different from “you do/don't care which one”.
    - shhsshs 13d ago
      “Care” may not be the correct word, but in those examples the difference is whether you are referring to a specific instance, or any instance of a group. When you say “I went to the doctor,” you did in fact go to a specific doctor (or “I will go to the doctor” meaning you will go to one). It would be equally valid to say “I went to a doctor”, it’s just less specific.
      - necovek 12d ago
        I believe it is food for thought — would one ever say "this was the nice evening"? Here it only sounds OK if you make the adjective stronger ("this was the nicest evening", though you'd probably avoid "nice" in this case and go with "best", "most amazing"...), or drop the adjective altogether ("this was the evening"). So nuance is that you might have many nice evenings, with this being one of — but what if you do not, and all are actually terrible except for this one? I guess with proper pronounciation of "THE nice", it can still work (we already talked about nice evenings and not-nice ones, so it'd be "this was the nice one"), but it'd be pretty awkward.
        xigoi 12d ago
        “At the start of the year, my crystal ball told me that all my evenings this year are going to be bad except for one. This was the nice evening.”
        necovek 12d ago
        Yes, exactly the example I put in ("the one") — thanks for sharing it and showing it might not even be awkward!
        nkrisc 12d ago
        Absent any context, “the nice evening” sounds strange because no one really expects there to be only one nice evening. However it can makes sense if the surrounding context supports the idea of only one nice evening. Grammar rules are generally about the surrounding context which allow us to leave out superfluous or repeated information and still be understood. Things sound strange when that missing information can’t be deduced from context.
        shhsshs 12d ago
        One could imagine a very stressful weekend (two evenings), one of which was “the rough evening” and the other was “the nice evening”.
  - SilasX 13d ago
    Well, on that note: the construction “I went to the store” has always felt wrong to me as a native speaker. People say it even when that store lacks definiteness in context (ie the listener has no reason to know which one you mean). At the very least, it counts as a separate usage of “the” that doesn’t follow the usual pattern, like when you say “the bigger they are, the harder they fall”. Edit: Here's a frustrating HN thread where someone tried to claim it makes sense, but it turned out his argument hinged on "well obviously all native English speakers regularly go to some store, right?" Screw the homebound. https://news.ycombinator.com/item?id=32620015 https://news.ycombinator.com/item?id=32620015
    - deleted 13d ago
      [deleted]
    - lawsthro0532 13d ago
      Looking at: https://advice.writing.utoronto.ca/english-language/definite-article/ https://advice.writing.utoronto.ca/english-language/definite... I think the usage falls into this group: "The first group consists of nouns which refer to shared knowledge of the situation or context...", When you're talking to people you live with it is true that they know which store you are going to. Friends and neighbours would have also have known up to fairly recently, when people still mostly walked for groceries and such to the few small stores nearby and made friends with people who lived close. So, I'd say it's a bit of a colloquial hold over from walking times and construction taking a listener into confidence.
      - SilasX 13d ago
        >When you're talking to people you live with it is true that they know which store you are going to. But again, people use this even when I have no reason to know which store they went to. I’m not necessarily saying they should stop doing this, but it’s clearly not the usual kind of definiteness implied but the use of “the”.
        jacobolus 12d ago
        It is common for someone to say, for instance, "I need to go to the store" even if they don't have any particular store in mind. A prescriptivist pedant might insist that this is incorrect, and they should instead say "I need to go to a store", but in my judgment as a native speaker, the version with "the" is more idiomatic, and the version with "a" sounds stilted.
  - thaumasiotes 12d ago
    > I'm going to the bank, the shop, the dentist, the pool - I have a regular one in mind and you may well also know which one I mean. Well, that would work for many uses of the, but it's definitely not a correct explanation here. If I have no idea where the bank is, I'll still describe myself as going to "the bank". I could tell you that "I'm going to the bank", go out and get in my car, and then look up where a convenient bank is. This has to be viewed as idiomatic, or as "the bank" being an abstract task-based location rather than a concrete physical location.
  - mrheosuper 12d ago
    "Do you have any kids ?" "I have the son" sounds odd, even if there is only 1 son on your mind.
- margalabargala 13d ago
  Beyond that, there are cases where you absolutely are referring to a specific one, but use a/an. "Our house has a pool" for example. There is a very specific pool being referred to, but it's sufficiently indirect that "the" would never be used here without radically changing sentence meaning.
  - necovek 12d ago
    I understand this mostly as "our house is one of a set of houses with pools", which is what anybody cares about in this sentence. It's like saying "our house has a roof" — very similar, but nobody really cares about the roof, the focus remains on the house.
  - xigoi 12d ago
    This doesn’t count because the determination of which house you mean is not based on previous context, but only on the sentence itself.
    - margalabargala 12d ago
      Do you mean pool?
      - xigoi 12d ago
        Yes.
  - thaumasiotes 12d ago
    The reason you say "our house has a pool" is not that you're not referring to a specific pool. It's that the pool you're referring to is not already present in the conversational context, and it needs to be introduced. A(n) performs that introduction. If you refer to that same pool without introducing it, it will still be marked for definiteness - compare my pool, my house's pool, or the pool at my house. But your example sentence doesn't work that way. (Note that the three phrases I listed are all bare noun phrases that can't stand as sentences. Note also that if you used one of those phrases when your listener wasn't already aware that you had a pool, they might feel that you "moved too fast" in the conversation, assuming that they knew about your pool when they didn't.)
- elendilm 13d ago
  Maybe it must be considered from the perspective of the speaker. He may have a particular dentist in mind when he says "the dentist" and maybe the listener not having privy to it may not be relevant. And he may be saying "a" about the word "nice" instead of about the word "evening". Note: This is just my opinion and an attempt at trying to make sense of it. Purely subjective take as I usually refrain from making purely opinion based arguments.
  - necovek 12d ago
    No matter how much we try to make objective statements, they are never based on "full, provable truth", and are thus opinions. Conversing with other humans is exchanging opinions based on their own previous knowledge. Thus no need to — when conversing with non-malicious people — state that your opinion is, in fact, your opinion. I appreciate it for what it is, and if I am curious about the basis for it, I will inquire more. All of the above is in my opinion, but I never state that and assume a good faith reader will take it as such (here for demonstration purposes only :)). So in short, thanks for your opinion, and I agree this is the largely the basis for choosing between an indefinite and definite article, also opening them up to inquiry ("I am going to the store" — "oh, which one?"; compare to "I am going to a store" — "what are you getting?").
    - elendilm 12d ago
      I appreciate your good faith, the suggestions, and your elaboration on them. For context, extensive coding over two decades has ingrained in me the habit of explicitly disambiguating my statements of machine-executable logic expressed in natural language from personal guesswork and opinions. I should integrate your suggestion and try not to explicitly qualify my guesswork. Using passively implied qualifiers in the structure of my opinion pieces would be a step in the right direction.
      - necovek 12d ago
        I believe it can be even simpler. "Chocolate ice-cream is the best" is very clearly not an (attempt at) objective statement and needs no qualifiers. Only if the reader really wants to be malicious, they can question even that too: what do you base that on? how many ice-cream types have you tried? is there a study confirming preferred taste among a large population? is it cultural and has that been tested? ... "In my opinion, based on roughly 60 ice-cream flavors I have tried in my life, and having tried chocolate flavor in at least 50 different places, I find that the taste of chocolate ice-cream on average is the best tasting ice-cream regardless of my mood, fullness or place of production and variety of 'chocolate' used" makes for a very boring conversation — except sometimes when you are making a go at it :)
- zdc1 12d ago
  "I go to the dentist every year" implies that you have a usual dentist or some sort of stable routine or plan vs "I go on a trip every year" which implies the journey is yet to be selected/defined from a multitude of options. So I feel the rule isn't always taken literally, but the vs a is selected based on whether something is up for consideration/substitution rather than something that's well defined and specified.
- nkrisc 12d ago
  The dentist, the supermarket, the park, etc. Because you are referring to a specific one of each, even if a listener doesn’t necessarily know which specific one, they know that you know. In the case of your example the listener assumes you mean whichever specific dentist you are currently seeing. That fact that you may choose one randomly each time is an exception.
kazinator 13d ago
Nope! Because "the" also refers to a class/category which is essentially the opposite of indicating a particular member. For instance, "the bald eagle is native to North America". There is also "The" in names; The Beatles, The Great Lakes, The Bahamas, The Bronx, ... The role of "the" depends on context: how was the subject treated in previous sentences in the conversation. "I see a bald eagle out of the window. The bald eagle is huge!" In this second sentence, there is no way that "the bald eagle" could refer to the class of bald eagles, because the previous sentence introduces the topic of the sighting of a bald eagle. It refers to that one. If "the bald eagle is huge" appears out of the blue, not preceded by any discussion of any eagle, that tends to bring in the class interpretation. I learned the above through Japeanese. A similar thing happens with the は (wa) topic particle; I realized that "the" works in a similar way in that regard.
- kazinator 12d ago
  > there is no way that "the bald eagle" could refer to the class of bald eagles Well, on second thought ...
Sharlin 13d ago
That much is obvious and everyone learns it like on the first week of English learning, of course. It’s the various cases where that simple rule doesn’t apply that are difficult. "I play the piano" And then there are those cases where you actually use neither!
- necovek 12d ago
  And "There is a piano in the lobby."
  - Nemi 12d ago
    I see this as consistent. When you say "I play the piano" you are really saying, "There are many instruments – banjo, trumpet, clarinet, and piano. I play the piano". Saying "I play a piano" is also correct. But the inference is that you are referring to one particular piano. In the sentence "There is a piano in the lobby" you are saying "There are many objects in the lobby. Among them is a piano, one of many in the world".
    - necovek 12d ago
      But it's still where the generic, simplistic application of the rule of "the for distinct, a for generic" fails. When "you can play the piano", you can play any piano. When "there is a piano in the lobby", it's distinctively a very specific one. So I would go on a limb and claim: whether you use the or a is also philosophical in nature :)
red75prime 12d ago
This doesn't touch place names. The Hague, Amsterdam, The Maldives, Australia, The Netherlands, France...

layer8 13d ago

That rule isn’t universal though. “I go to the dentist every year” doesn’t imply that I particularly care about a specific dentist (or, case in point, about the specific dentist). “This was a nice evening” is also difficult to characterize as not caring about which evening it is. As are books titled “An Introduction to XYZ”, where both the authors and the readers will probably care about the specific book.

rawling 13d ago
I'm going to the bank, the shop, the dentist, the pool - I have a regular one in mind and you may well also know which one I mean. I'm going to a bank, a shop, a dentist - I've found a new one and I may well be about to describe it to you. "A nice evening" - there have been ones before, there hopefully will be again, this was one of them.
- layer8 13d ago
  Sure, but that’s different from “you do/don't care which one”.
  - shhsshs 13d ago
    “Care” may not be the correct word, but in those examples the difference is whether you are referring to a specific instance, or any instance of a group. When you say “I went to the doctor,” you did in fact go to a specific doctor (or “I will go to the doctor” meaning you will go to one). It would be equally valid to say “I went to a doctor”, it’s just less specific.
    - necovek 12d ago
      I believe it is food for thought — would one ever say "this was the nice evening"? Here it only sounds OK if you make the adjective stronger ("this was the nicest evening", though you'd probably avoid "nice" in this case and go with "best", "most amazing"...), or drop the adjective altogether ("this was the evening"). So nuance is that you might have many nice evenings, with this being one of — but what if you do not, and all are actually terrible except for this one? I guess with proper pronounciation of "THE nice", it can still work (we already talked about nice evenings and not-nice ones, so it'd be "this was the nice one"), but it'd be pretty awkward.
      - xigoi 12d ago
        “At the start of the year, my crystal ball told me that all my evenings this year are going to be bad except for one. This was the nice evening.”
        necovek 12d ago
        Yes, exactly the example I put in ("the one") — thanks for sharing it and showing it might not even be awkward!
      - nkrisc 12d ago
        Absent any context, “the nice evening” sounds strange because no one really expects there to be only one nice evening. However it can makes sense if the surrounding context supports the idea of only one nice evening. Grammar rules are generally about the surrounding context which allow us to leave out superfluous or repeated information and still be understood. Things sound strange when that missing information can’t be deduced from context.
      - shhsshs 12d ago
        One could imagine a very stressful weekend (two evenings), one of which was “the rough evening” and the other was “the nice evening”.
- SilasX 13d ago
  Well, on that note: the construction “I went to the store” has always felt wrong to me as a native speaker. People say it even when that store lacks definiteness in context (ie the listener has no reason to know which one you mean). At the very least, it counts as a separate usage of “the” that doesn’t follow the usual pattern, like when you say “the bigger they are, the harder they fall”. Edit: Here's a frustrating HN thread where someone tried to claim it makes sense, but it turned out his argument hinged on "well obviously all native English speakers regularly go to some store, right?" Screw the homebound. https://news.ycombinator.com/item?id=32620015 https://news.ycombinator.com/item?id=32620015
  - deleted 13d ago
    [deleted]
  - lawsthro0532 13d ago
    Looking at: https://advice.writing.utoronto.ca/english-language/definite-article/ https://advice.writing.utoronto.ca/english-language/definite... I think the usage falls into this group: "The first group consists of nouns which refer to shared knowledge of the situation or context...", When you're talking to people you live with it is true that they know which store you are going to. Friends and neighbours would have also have known up to fairly recently, when people still mostly walked for groceries and such to the few small stores nearby and made friends with people who lived close. So, I'd say it's a bit of a colloquial hold over from walking times and construction taking a listener into confidence.
    - SilasX 13d ago
      >When you're talking to people you live with it is true that they know which store you are going to. But again, people use this even when I have no reason to know which store they went to. I’m not necessarily saying they should stop doing this, but it’s clearly not the usual kind of definiteness implied but the use of “the”.
      - jacobolus 12d ago
        It is common for someone to say, for instance, "I need to go to the store" even if they don't have any particular store in mind. A prescriptivist pedant might insist that this is incorrect, and they should instead say "I need to go to a store", but in my judgment as a native speaker, the version with "the" is more idiomatic, and the version with "a" sounds stilted.
- thaumasiotes 12d ago
  > I'm going to the bank, the shop, the dentist, the pool - I have a regular one in mind and you may well also know which one I mean. Well, that would work for many uses of the, but it's definitely not a correct explanation here. If I have no idea where the bank is, I'll still describe myself as going to "the bank". I could tell you that "I'm going to the bank", go out and get in my car, and then look up where a convenient bank is. This has to be viewed as idiomatic, or as "the bank" being an abstract task-based location rather than a concrete physical location.
- mrheosuper 12d ago
  "Do you have any kids ?" "I have the son" sounds odd, even if there is only 1 son on your mind.
margalabargala 13d ago
Beyond that, there are cases where you absolutely are referring to a specific one, but use a/an. "Our house has a pool" for example. There is a very specific pool being referred to, but it's sufficiently indirect that "the" would never be used here without radically changing sentence meaning.
- necovek 12d ago
  I understand this mostly as "our house is one of a set of houses with pools", which is what anybody cares about in this sentence. It's like saying "our house has a roof" — very similar, but nobody really cares about the roof, the focus remains on the house.
- xigoi 12d ago
  This doesn’t count because the determination of which house you mean is not based on previous context, but only on the sentence itself.
  - margalabargala 12d ago
    Do you mean pool?
    - xigoi 12d ago
      Yes.
- thaumasiotes 12d ago
  The reason you say "our house has a pool" is not that you're not referring to a specific pool. It's that the pool you're referring to is not already present in the conversational context, and it needs to be introduced. A(n) performs that introduction. If you refer to that same pool without introducing it, it will still be marked for definiteness - compare my pool, my house's pool, or the pool at my house. But your example sentence doesn't work that way. (Note that the three phrases I listed are all bare noun phrases that can't stand as sentences. Note also that if you used one of those phrases when your listener wasn't already aware that you had a pool, they might feel that you "moved too fast" in the conversation, assuming that they knew about your pool when they didn't.)
elendilm 13d ago
Maybe it must be considered from the perspective of the speaker. He may have a particular dentist in mind when he says "the dentist" and maybe the listener not having privy to it may not be relevant. And he may be saying "a" about the word "nice" instead of about the word "evening". Note: This is just my opinion and an attempt at trying to make sense of it. Purely subjective take as I usually refrain from making purely opinion based arguments.
- necovek 12d ago
  No matter how much we try to make objective statements, they are never based on "full, provable truth", and are thus opinions. Conversing with other humans is exchanging opinions based on their own previous knowledge. Thus no need to — when conversing with non-malicious people — state that your opinion is, in fact, your opinion. I appreciate it for what it is, and if I am curious about the basis for it, I will inquire more. All of the above is in my opinion, but I never state that and assume a good faith reader will take it as such (here for demonstration purposes only :)). So in short, thanks for your opinion, and I agree this is the largely the basis for choosing between an indefinite and definite article, also opening them up to inquiry ("I am going to the store" — "oh, which one?"; compare to "I am going to a store" — "what are you getting?").
  - elendilm 12d ago
    I appreciate your good faith, the suggestions, and your elaboration on them. For context, extensive coding over two decades has ingrained in me the habit of explicitly disambiguating my statements of machine-executable logic expressed in natural language from personal guesswork and opinions. I should integrate your suggestion and try not to explicitly qualify my guesswork. Using passively implied qualifiers in the structure of my opinion pieces would be a step in the right direction.
    - necovek 12d ago
      I believe it can be even simpler. "Chocolate ice-cream is the best" is very clearly not an (attempt at) objective statement and needs no qualifiers. Only if the reader really wants to be malicious, they can question even that too: what do you base that on? how many ice-cream types have you tried? is there a study confirming preferred taste among a large population? is it cultural and has that been tested? ... "In my opinion, based on roughly 60 ice-cream flavors I have tried in my life, and having tried chocolate flavor in at least 50 different places, I find that the taste of chocolate ice-cream on average is the best tasting ice-cream regardless of my mood, fullness or place of production and variety of 'chocolate' used" makes for a very boring conversation — except sometimes when you are making a go at it :)
zdc1 12d ago
"I go to the dentist every year" implies that you have a usual dentist or some sort of stable routine or plan vs "I go on a trip every year" which implies the journey is yet to be selected/defined from a multitude of options. So I feel the rule isn't always taken literally, but the vs a is selected based on whether something is up for consideration/substitution rather than something that's well defined and specified.
nkrisc 12d ago
The dentist, the supermarket, the park, etc. Because you are referring to a specific one of each, even if a listener doesn’t necessarily know which specific one, they know that you know. In the case of your example the listener assumes you mean whichever specific dentist you are currently seeing. That fact that you may choose one randomly each time is an exception.

kazinator 13d ago

Nope! Because "the" also refers to a class/category which is essentially the opposite of indicating a particular member. For instance, "the bald eagle is native to North America". There is also "The" in names; The Beatles, The Great Lakes, The Bahamas, The Bronx, ... The role of "the" depends on context: how was the subject treated in previous sentences in the conversation. "I see a bald eagle out of the window. The bald eagle is huge!" In this second sentence, there is no way that "the bald eagle" could refer to the class of bald eagles, because the previous sentence introduces the topic of the sighting of a bald eagle. It refers to that one. If "the bald eagle is huge" appears out of the blue, not preceded by any discussion of any eagle, that tends to bring in the class interpretation. I learned the above through Japeanese. A similar thing happens with the は (wa) topic particle; I realized that "the" works in a similar way in that regard.

kazinator 12d ago
> there is no way that "the bald eagle" could refer to the class of bald eagles Well, on second thought ...

Sharlin 13d ago

That much is obvious and everyone learns it like on the first week of English learning, of course. It’s the various cases where that simple rule doesn’t apply that are difficult. "I play the piano" And then there are those cases where you actually use neither!

necovek 12d ago
And "There is a piano in the lobby."
- Nemi 12d ago
  I see this as consistent. When you say "I play the piano" you are really saying, "There are many instruments – banjo, trumpet, clarinet, and piano. I play the piano". Saying "I play a piano" is also correct. But the inference is that you are referring to one particular piano. In the sentence "There is a piano in the lobby" you are saying "There are many objects in the lobby. Among them is a piano, one of many in the world".
  - necovek 12d ago
    But it's still where the generic, simplistic application of the rule of "the for distinct, a for generic" fails. When "you can play the piano", you can play any piano. When "there is a piano in the lobby", it's distinctively a very specific one. So I would go on a limb and claim: whether you use the or a is also philosophical in nature :)

red75prime 12d ago

This doesn't touch place names. The Hague, Amsterdam, The Maldives, Australia, The Netherlands, France...