Singular “they” triggers agreement with the same verb forms as plural “they”. Just like “you” - no matter if I’m saying “you are a muppet”, it’s still “are” (even if singular), not “art” or “bist” (as you’d use with “thou”).
(inb4: the analogy between “you” and “they” is perfectly valid, because “they” is following the exact same path as “you” - even if one refers to the second person, another to the third.)
From your other comment:
I’m not the one disregarding the grammar rules. You are.
They aren’t. You’re the one getting things wrong, by conflating grammatical number with agreement, as if they were in a 1:1 correspondence.
Singular “they” triggers agreement with the same verb forms as plural “they”. Just like “you” - no matter if I’m saying “you are a muppet”, it’s still “are” (even if singular), not “art” or “bist” (as you’d use with “thou”).
(inb4: the analogy between “you” and “they” is perfectly valid, because “they” is following the exact same path as “you” - even if one refers to the second person, another to the third.)
From your other comment:
They aren’t. You’re the one getting things wrong, by conflating grammatical number with agreement, as if they were in a 1:1 correspondence.