Sometimes you need to be pointedly vague to throw them off the scent for when you'll be purposefully vague.

Aye. Cuts back on metagaming, or at least, forces metagaming to eat its own tail. ;) Now the question is whether or not our esteemed author is setting up for a significant deviation from the canon story, or if it really is just to mess with the cast. :D

I mean they have the island eating and pooping goldfish coming up. That could be what he’s alluding to?

Could be... but was the island made from its defecation is someplace else.

That would be Nanimonai Island.

It's like when the GM say "He don't seems to be lying" after they make a roll to see if a NPC is being truthful (sense motive check?)