“Break for lunch. Anyone have a picture of Taco Bell on them?”

First tenet: If P.T. Barnum had lived in the age of terrorism, you’d see fake bomb/ivory/truffle detectors being made that worked by showing the thing a picture and tuning it to the “vapors” of the stuff.  Second tenet: We DO have this being made.  Conclusion: P.T. Barnum is still alive and living in the Bermuda Triangle.  Bonus conclusion: There are more minutes in the day than there used to be, and the suckers born therin have a lot more money.

Read about it on Wikpedia: ADE_651