Exhibit A: The superstar comic's August 18 appearance on The Tonight Show with Jimmy Fallon:

Exhibit B: Cosby's follow-up performance this week on The Colbert Report:

Supplementary materials:

*This supposition put forth in Gawker comments (about the Fallon appearance)
*This lingering bit of weirdness
*The fact that Bill Cosby was born in 1937, and is thus 77 years old

Let's randomly speculate!