The denial is strong in this one!
Where, in Hosty's notes, does it say Oswald went outside BEFORE JFK passed by?
It doesn't.
You simply make your own reality up and believe it to be true.
Read Hosty's notes again. He doesn't say anything like what you are insisting he does.
The only denial is when Kelly reported Oswald denied seeing the parade.
When asked if he was in the building at the time of the shooting, Oswald states that he was. Is that denial?
In Hosty's notes
Oswald does not say he went outside before JFK passed by.
Can't you acknowledge this simple error by yourself?