posit

\POZ-it\, transitive verb:
1. To assume as real or conceded.
2. To propose as an explanation; to suggest.
3. To dispose or set firmly or fixedly.

"All right, let's posit, for a moment, that golf IS fun to watch. That still doesn't explain this slaughtered pigeon!"

"Historians posit that I put the bomp in the bomp-a-bomp-a-bomp, no matter how many times I insist that I was merely responsible for the ram in the ram-a-lam-a-ding-dong."