@Rickett2222;
Then disagree we shall. This professor recited a story, which was offered as a complete truth, almost a parable! Clearly it is stated "a large empty mayonnaise jar", which was not empty at all! The students had this story programmed into their minds, they believe they have received full information and never question it, the story remains faulty and those programmed with it, propagate it. This is proven by people reciting the same faulty story, they haven't thought outside of this story and develop cognitive dissonance about it, defending faulty logic as if it is complete and correct, which it is not.
The glass is half full of water, and half full of air, therefore it is full.
Never forget that on the internet you have delinquents chatting from jail, policemen on duty, hookers, politicians, indians, drug dealers, mental cases,.. Be ready for anything.