What does he have to gain by doing so? Think about it. Keeping the certificate from the public allows nutjobs to move in an marginalize the Conservative movement. The left gets to paint us as wackjobs and Obama looks like the victim.
He has absolutely nothing to gain by showing his Birth Certificate. If I were a marxist thug I'd do exactly the same thing.
Obama's handlers know that if they give their opponents the rope, they'll hang themselves.
You are twisting yourself into knots and not fooling anyone with your word jugglery. You need to try another tactic, this one is not working.