Thank you very much for your question.
I did not know that Mr. Ullyatt attended church with Mr. Mains. I did know that Mr. Ullyatt attended church. I did not know that Tim Egan was a member of the Rideau Club, but I did know that Russell Ullyatt was a member of the club. I didn't ask Mr. Ullyatt who else were members of the club, or who he attended church with.
He was married recently. I was invited to his wedding. I knew his fiancée. I have met his mother.
There are things I do know, but when you ask if I knew that he attended church with Mr. Mains, I did not know that.