One logical fallacy I don't like is the Sunk Cost fallacy. It says that because I already read half a book, I should read the rest too, even though I don't want

One logical fallacy I don't like is the Sunk Cost fallacy. It says that because I already read half a book, I should read the rest too, even though I don't want to, b/c that will somehow make reading the first have less of a waste. It's like throwing good money after bad. Another example is when you write a draft comment, that is a sunk cost. When you recognize that comment is off topic and shouldn't be posted, you cannot recoup your sunk cost by posting it anyway. That just makes things worse.