Hmm does that mean you do have an opinion and a working hypothesis ("most likely scenario"), but fear getting picked apart?
This attitude strengthens my conviction that truthers have learned not to make claims, having been debunked every time they made claims in the past.
With no claims to make, I suppode the truth movement really dead.
I don't think it is irresponsible to "speculate". And there is no shame in saying "I don't know this". At least you could say something along the lines of "I don't believe planes were hijacked" or "I am not convinced planes crashed into the buildings" or "I find it likely that plane crashes and fires were not the only intentionally applied forces that brought the towers down" or "I suspect some leaders of the CIA knew in advance"
Are you a man without convictions??