Just what is a primary source.? President Washington is deceased and unable to talk with you directly. :-}
Thanks for injecting a little humor! :-) To most historians (yes there are some), a primary source is one that is directly attributable to the source is question; e.g., a manuscript (or diary or letters) written by Washington's hand, photographs, et al. Washington's daughter speaking about her father's religious foundation is, IMO, a secondary source. She clearly states that she " never witnessed his private devotions. I never inquired about them. I should have thought it the greatest heresy to doubt his firm belief in Christianity. His life, his writings, prove that he was a Christian." His writings do not (as far as I've found so far) support her assertions.
You don't think Dobie would take the President's word for it, do you JW?
No. General Washington would need a battery of polygraphs and some sodium pentothal, and then Dobie would still take it under advisement.
LOL...
Dob, ya gotta give John a little slack, dontcha think?