Without using your other hand to assist, it is impossible to lick your elbow. Prove it, preferably in the office.
A

The Smithsonian has over 69 million catalogued items of which never more than 1% is on display at any given time.
B

Most people show their ignorance by calling the active ingredient in marijuana 'THC'. I, on the other hand, always refer to it by its full name, Delta-9-Tetrahydrocannabinol, like any proper person should.
A

The race of creatures depicted on the borders of ancient maps whose faces are on their chests, and who have no heads are named Blemyes.
B

I know that Donald Duck's license plate number is 313. It has been for decades.
B

A mixture of Twinkie filling and Vaseline will fluoresce under ultraviolet light.
B

'Steamboat Willie' is NOT the first Mickey Mouse cartoon. That honour goes to 'Plane Crazy.' Mickey Mouse cartoon #2 is 'The Galloping Gaucho.' 'Steamboat Willie' was the third Mickey Mouse cartoon produced, but the first released to the public. All three shorts date from 1928.
B

The distance between your wrist and your elbow is almost exactly the same length as your foot. Prove it, preferably in the office.
A