You asked if Y would be true given that X is true. It's called leading the question. The other party agreed with your assertion, hence the "would" as in "Y would be true, IF X were true," with the emphasis on the if being mine. Then you used that to assume X is true, which they never admitted to, so they corrected you by stating X isn't actually true.
Yes, as a separate question from the former.
I know you're trying to explain why people can interpret my hypothetical questions as a single question, but it still doesn't make sense. What you're saying that I asked doesn't describe everything I asked.
The first question is independent of the second, and the second question is dependent on the first. The first question takes precedence, and was asked separately. It stands alone and doesn't depend on the answer of the other question. Otherwise, I would have structured it as a single question statement, like "If X is true, then would Y also be true?" That's a different question from what I asked because it's not asking whether X is true, but in the case that X is true.
To place precedence on the dependent question seems backwards and inefficient to me. Why answer it when it's negated by the independent question preceding it?
If the roles were reversed, my answer would be "No, X isn't true" followed by either "And yes, Y would be true as well if X is true, but X is not true" or "And no, Y is isn't related to X and can be true even if X is false."
> (am assuming the direct leader, but only speculating).
No, this is usually not with direct leaders. It happens with colleagues I need information from, and occurs even with a query that simple.
1. Is X true?
2. If X is true, does that mean that Y is also true?
People sometimes, but not always, follow suit and number their replies.
Plus colloquially if asked a two part "or" question, there is some ambiguity in a single part answer, but usually a "yes" will refer to the second part.
"Shall we go to the shop or the café?" "Yes." -> café.
This drives computer programmers nuts because we're so used to thinking in boolean logic terms but it's very common.
> "Shall we go to the shop or the café" "Yes" -> café
Not a pattern I run into. Maybe it's regional?