What's this verbal device called?

I ask you an either/or question. You skip the answer and go straight into the explanation, but explain in such a way that the question (and the next one you might have asked) is answered.

A couple of examples:

“Would you like the lobster or the lasagne?”
“I don’t like lasagne.”

“Do you have any blank videotapes?”
“They’re right at the back, in the music section.”

It’s obvious in what cases what the answer is, even though the question wasn’t answered directly. Is there a word for this, or is it lumped in with other forms of ellipsis?

Would you prefer the following:

“Do you have any blank videotapes?”
“Yes, we do.”
I’m not sure what that would be called either

I’d call them indirect answers.

I’d call 'em oblique answers. There’s gonna be a fight now. :smiley:

If there are names for the examples, there may be one per example as the q&a are fundamentally different.

In the second, there can be no reasonable interpretation of the exchange, except that they have videotapes.

In the first, the question says nothing about the speaker’s like, dislike or indifference to lobster. If you believe the speaker likes lobster you can do so, but you are concluding it, possibly without adequate justification.