Okay. I literally said they weren't truly omnipotent nor omniscient, but that they were crazy powerful and generally portrayed as knowing a ton of things, so....not really sure who you're arguing with.
Edit: And, I mean, it's worth noting that it is ANOTHER GOD that tricked Zeus at Mecone...not a mortal. Which was what was being discussed here.
Edit 2 electric boogaloo: In fact, Hesiod's version of the tale doesn't even have Zeus being tricked. In that version, possibly an intentional change out of a desire to be, or seem, more pious--Zeus isn't tricked, and knows exactly what he's getting. He chooses the worse option, in Hesiod's telling, so that he has a reason to vent his anger at humanity.
So, yeah. It depends on source, time period, and region. SOME versions of Zeus are practically omniscient. SOME versions of Zeus are frankly less knowledgeable than well-informed mortals. And it can vary to almost every point between.