Actually, it's a great demonstration of why taking a literal definition of a word fails. No English speaker would consider babies to be bachelors. The connotation of the word precludes that. Just because the word can "technically" include them-- due to the inherent and unavoidable simplification involved in creating a defintion-- does not mean that they should be considered bachelors.
But a baby isn't a bachelor... not even technically:
bach·e·lor
noun
1. an unmarried man.
Bachelor | Define Bachelor at Dictionary.com
man
noun
1.
an adult male person, as distinguished from a boy or a woman.
Man | Define Man at Dictionary.com
A baby boy isn't an adult, so he isn't a man, which means he's not a bachelor.
Seriously? Beer and gods are the only thing too complex to be able to categorically sort? Any statement of any sort will run into the same issue if you put it on a similarly high pedestal.
Do you claim you must meet every dog, try every dish in a particular cuisine, watch every movie with a particular actor, read every book in a particular genre, and ad infinitum, before you can make a statement about whether you like or dislike them?
I think a person can merely not like something based on even limited experience. If you've never seen a Keanu Reeves movie, then I think it's fair to say that you don't like Keanu Reeves.
To go beyond mere "not liking" to active dislike of a whole category of thing, you have to have experienced enough of the thing for your experience to be reflective of the whole.
In the case of dogs, for instance, if you've experienced a wide variety of dogs - all sorts of breeds, large and small, high- and low-energy, well-trained and rambunctious, well-mannered and aggressive - then I'd say that you probably can say that you dislike dogs as a category even if you haven't met every single dog. If you have lots of experience with labs, say, then we probably already have a good idea of what you'd think of duck tolling retrievers even if you haven't met one.
Do you need to research every aspect of Bigfoot, mermaid, fairy, alien, Santa Claus, dryad, nymph, etc lore in order to claim whether you believe they exist or not?
Every thing in your life that you have made a decision about has been made despite the fact that you have not known everything you could possibly know, experienced everything you could have possibly experienced, and researched everything you possibly could research on the subject.
And you claim that only beer and god fall into this category. Open up your eyes, man!
Again: not every aspect. You just need to know enough of a thing that your experience is reflective of the category as a whole.
I would agree that fairies, like gods, can be a bit difficult to pin down as a category, but even they don't have the problems that we get when we try to pin down gods... vagueness is one thing; internal contradiction is another: can you come up with a definition for "god" that includes the Norse and Greek pantheons but excludes angels? Even before asking whether or not we believe in gods, we have to ask ourselves whether "god" is even a coherent concept. My approach to the term "atheism" doesn't need it to be coherent; yours does, IMO.
Claiming that atheism is the belief that gods don't exist no more requires you to reject every possible god concept that has been or will be conceived than saying that you don't believe in fairies requires you to know of every single type of fairy ever imagined... or to watch every single Nicholas Cage movie before determining that he sucks as an actor... or pet every single dog to know that you like dogs.
First off... the dog thing probably muddies the waters, because I don't think the analogy works entirely. If a person believes in one god and rejects all others, then we'd call him a theist, but we wouldn't say that a person who likes only one dog and hates the rest "likes dogs". The language we use in those cases isn't directly analogous.
When it comes to fairies, I reject their existence because I can recognize a common element to all fairies: fairies are magical beings. I reject the existence of magic, and therefore I reject the existence of magical beings, including fairies.
When it comes to gods, what's the common element that I can reject? So far, the only thing I've been able to find that's common to all god-concepts is that they're all objects of worship... but I don't reject the existence of all objects of worship.