In an answer to a question about logic, Prof Maitzen says he is unaware of any evidence that shows classical logic fails in a real-life situation.
Perhaps he has never heard of an example from physics that shows how classic logic does not work in certain restricted situations?
A polarizing filter causes light waves that pass through it to align only in one direction (e.g., up-down or left-right). If you have an up-down filter, and then a left-right filter behind it, no light gets through.
However, if you place a filter with a 45 degree orientation between the up-down and left-right filter, some light does get through.
It seems to me that classic logic cannot explain this real-world result.
Read another response by Allen Stairs