I have a story premise which I have written a few outlines for now, not sure where to go. I keep failing to come up with a villain plan that allows him to screw up without coming off as stupid. Readers are telling me that all of a sudden he goes from smart to stupid, at the plot's requirement for him to get caught. I have come up with different plans for him but no matter which one, he always has to become stupid to get caught later, and it comes off as forced or inconsistent. Basically when a writer is to come up with the villain's evil plan, you want the plan to be as logical as possible so the reader is not questioning plot holes or implausible behavior. However, every logical, plausible plan I come up with, has a villain plan with no flaws in it. Any why wouldn't? Why would a logical plan have a flaw in it? But when coming up with a plan, how do I come up with one with a natural flaw, that will get the villain caught? What is the trick to coming up with a plan that is logical, yet leaves mistakes to be made, without coming off as stupid. Do you have any thoughts on how to approach this? Thank you very much for the input.