Of course, we never know whether a person is really trying to do something well. But the fact remains that there is scant record of people being able to duplicate the feat with ease.
What exactly was the feat and when was any attempt to duplicate it ever made?
The fact is that Marina witnessed Oswald working the bolt,
How is that a "fact"?
...except when did she even say that?
Mr. RANKIN. You have described your husband's practicing on the hack porch at New Orleans with the telescopic scope and the rifle, saying he did that very regularly there.Did you ever see him working the bolt, that action that opens the rifle, where you can put a shell in and push it back- during those times?Mrs. OSWALD. I did not see it, because it was dark, .. and I would be in the room at that time.But I did hear the noise from it from time to time not often.
Mr. RANKIN. You have told us about his practicing with the rifle, the telescopic lens, on the back porch at New Orleans, and also his using the bolt action that you heard from time to time.Will you describe that a little more fully to us, as best you remember?Mrs. OSWALD. I cannot describe that in greater detail. I can only say that Lee would sit there with the rifle and open and close the bolt and clean it. No, he didn't clean it at that time. Yes--twice he did clean it.Mr. RANKIN. And did he seem to be practicing with the telescopic lens, too, and sighting the gun on different objects?Mrs. OSWALD. I don't know. The rifle was always with this. I don't know exactly how he practiced, because I was in the house, I was busy. I just knew that he sits there with his rifle. I was not interested in it.