David Brock was a conservative.
Brock states, "All conservatives are liars."
Unfortunately, this isn't much of a paradox. David Brock was a conservative, hence was a liar; now he may or may not be a liar, hence his contention that all conservatives are liars could be true. In this formulation, Brock seems more like Whittaker Chambers than like Epimenides.
But wait! Let's take another look at that Talk headline: "I Killed Anita Hill (Sorry, Anita)." Anita Hill is not dead. Therefore Brock couldn't have killed her. This shows Brock is still a liar, even though he says he is no longer a conservative. Which means Brock must be lying when he says he's no longer a conservative! Which means Tribble's proof is still plausible. ...