That's what led me down this path. Searching the internet for "how much caffeine is in a cup of coffee" leads to the question of "what is a cup?", "how did you

That's what led me down this path. Searching the internet for "how much caffeine is in a cup of coffee" leads to the question of "what is a cup?", "how did you brew it?", "what kind of grounds did you use?".