Was it it really not plainly obvious to you that I was not asking you that to learn whether the Earth is round or flat, but to learn whether you think the Earth is round or flat? Many people think it's flat!
you said you thought the earth is flat and you don't think that, so yes that is a lie. it doesn't matter if you were intentionally trying to be dumb, that doesn't obviate a lie
You also asked “is the earth flat” when you obviously knew it wasn’t did you not??? So wtf are you asking me such a dumb question for when you are going to be getting a dumb answer in return