Do you mean you have no memory of a tune, scent, a former home? No techniques to accomplish a goal or solve a problem, no idea how to win a game? You never have a fantasy or a plan? All these are ideas. So are equations, opinions, beliefs , mental pictures and those conversations you create when you are thinking about what you should have said to the boss when she humiliated you in front of the client. So are the shared concepts behind the words beauty, honesty, freedom, calm, ego, self, even, yes, idea. In fact, it would have been impossible to ask this question if you really lacked the ability to deliberately think of an idea, because the question is an idea, made by applying grammar, also an idea, to at least four ideas I can count.

People unable to create an idea may exist – but we can’t communicate with them to know what, if anything, is going on in their heads. If they do, they could only survive in a society that had the resources to keep their bodies alive. They might be among those considered in a vegetative state, but then advances in science have found that many thought vegetative were, in fact, conscious, but unable to respond to their environment.

Gwan wit’ee. Everyone has their own abilities. Stop worrying about what you are not so good at and work on developing your talents.