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What's your favourite type of beer?
(lemmy.ca)
(For some context, I live in Canada, beer labels are bilingually English & French here)
Usually I wouldn't bother, but seeing as this is a linguistics community; it's a lot more inclusive to use the singular "they" rather than "he" if you don't know the pronouns one uses.
Signed, not a he.
I don't necessarily agree with your argumentation generally speaking (both the generic masculine pronoun and singular they are fine in my opinion), but you do literally have your pronouns right there, so I will admit I could/should have avoided the issue anyhow. Sorry about that.
Edit: Oh, also, Weißbier, to answer your post's question.