It's the same lazy contrarian shell game that involves applying a subjective, impossible standard of proof to any evidence that implicates Oswald to suggest false doubt.
Translation from "Richard"-speak: I know my evidence is weak and inconclusive, but you should accept my conclusions anyway because it's all I've got.
Then going down the rabbit hole using a lot of pedantic arguments. Using that contrarian standard, no fact in human history could ever be proven. By necessity, if this form of analysis had any validity it would, by implication, suggest that something else occurred.
Translation from "Richard"-speak: I can't prove my claims so I'll shift the burden of proof and hope nobody notices.
The case against Oswald is overwhelming.
"Richard" is easily overwhelmed.
His rifle was found at the crime scene.
"His rifle". LOL.
It was used to kill JFK.
You don't know what weapon killed JFK.
Oswald had no credible alibi
Neither did at least 5 other people in the TSBD alone.
or explanation for the presence of his rifle on the 6th floor.
"His rifle". LOL.
Instead he lied about his ownership of that rifle,
Translation from "Richard"-speak: The way I know he "lied" is because I believe he owned it.
Circular.
fled the scene,
Translation from "Richard"-speak: if somebody leaves and I think they're guilty, then it is "fleeing".
and was involved in another murder less than an hour later.
Translation from "Richard"-speak: if I accuse somebody of committing another murder, then that somehow becomes evidence that he committed a different murder.
A slam dunk case. He would have been convicted in ten minutes by any jury.
Translation from "Richard"-speak: my fantasy about what would happen at a hypothetical trial is interesting and persuasive.