You have no idea who wrote the letter, that is the point, no one has proof either way, the doctor who or the President, which is why I don't believe either and will wait patiently until the truth comes out, just like I did with Benghazi.
Wrong, I don't know 100% who wrote the letter, but based on it's style, the fact that the letter contains verbiage that is questionable for a doctor and sounds exactly like Trump I can make an educated guess. And, if you're not a complete moron that has to have crossed your mind before the 'doctor' got back into the news. In other words, the 'doctor's' own words didn't change my mind. So, what are you left with? I guess you believed the 'doctor' awhile back when he said he did write the letter.