Textbook loaded question. How do you know he “got his revolver and jacket” at all?
Well, because he had his revolver and jacket afterwards.
I know you refuse to accept anything other than high quality CCTV footageof Oswald doing anything as sufficient proof (and even then you'd probably ask "how do you know this isn't fake?"), but dumb reasoning like that isn't being big or clever or showing off any highly advanced investigative skills.
I could quite easily pose dumb questions like:
- How do you know witnesses did actually see puffs of smoke from the grassy knoll and weren't just making it up solely to get on TV?
- How do we know the doctors at Parkland weren't just extremely p*ssed off about the secret services taking JFK's body and so decided to get together and lie about the autopsy to confuse things and get back at them?
And you wouldn't be able to answer them with any conclusive proof either way, because we know there isn't any.
As other people have already stated on this thread, Oswald admitted to going to the boarding house to get his revolver. And yes, the Warren Commission stated he did too. Do I believe everything in the WC? No, I don't but if you're claiming that in this instance this isn't the case then what alternative proof can you offer to back that up, rather than just dismissing it asking "Well, how do you know he did? Just because the WC said so?"