In part 1, just because a word can have different meanings, doesn't mean that it has no meaning when not in a sentence (how else would dictionaries exist?).

Then please answer the question from the text. What does "Will" mean?

Also, knowledge of the meanings of words doesn't necessarily come from literacy, but from acquisition of the language in general, which can, and often does, happen without reading (and indeed always does in languages without a script, for instance).

Of course. But can you point out which of my arguments does this refute?

People who argue against using "he/him/his" as generic pronouns are not arguing from semiotics, but instead from a socio-political perspective.

Yes, some people must use alternatives because of the socio-political perspective. If the traditional usage is considered as sexist, they can be fired or sued by using it. That's why I only consider people who genuinely oppose it. People who began complaining about it. People who started all this.