Undecidability is a consequence of the vast range of askable questions. For practically any system you can come up with questions that have an answer that can'

Undecidability is a consequence of the vast range of askable questions. For practically any system you can come up with questions that have an answer that can't be computed in the generic case. It isn't even a case of number of possible solutions - it can be a case of how long it takes to parse the very question itself.