On the other hand, I tell my students that I love it when they make big mistakes. Action and consequence are far better teachers than rote learning and then not being able to solve problems. Making a big mistake in the rarified atmosphere of the college situation is much better than doing so where the consequence might be significant loss of money and subsequent loss of employment.
The mistake, and its future prevention, is likely to be remembered for some time to come and certainly will become more imprinted in memory than something that is learnt for a moment and then never used.
I believe critical thinking is a combination of recognition of action and consequence AND the ability to think laterally, naturally.