Who quoted :?

Question

“A higher level of thinking is required to solve problems, than was present when they were created”

Any clues?

Answer 1

Google doesn't come up with any direct hits on that, but some close ones depending on how you organise your search terms.  One sample includes:

"They label questions as “tricky” or assume it was “not covered” in class because they are not able to apply or analyze content knowledge to solve problems that require a higher level of critical thinking than simple recall and recognition type questions they have mastered in the past."

Which seems to come near the meaning of your missing quote, but without more information it's difficult to allow for error in the original.  Can your provide more information?