Do you believe Obama is qualified to be President?
My belief about Obama's qualifications (or lack thereof) is plainly immaterial. The Constitution does not name "olddeckhand" as the inspecting authority of presidential candidates.
US law has been developed that ballot access is left to the states; The Secretaries of State generally speaking, or some other designated election's administration board. Nor does US Code or the US Constitution leave it to the Judiciary to evaluate either the qualification of presidential candidates, or the workings of the Electoral College.
Why this is lost on so many birthers, is puzzling.
You could say “consider to the best of your knowledge” - maybe he wouldn’t weasel out.