So much commentary and personal insults but again no answer. Could Oswald have reached the 2nd floor lunchroom after the assassination from the 6th floor if he did not use the stairs (which you claim is a demonstrable fact)? That is a straightforward yes or no question that does not require paragraph after paragraph of commentary about me.
No. Because here's why. If he was supposedly up there, he fired the last shot. He wiped down the boxes enough so only a partial [dubious] palm print was found on one of the boxes, after supposedly moving around several to build the nest. He's going to make an elaborate deal about hiding the gun so he can try to get away. Here's the so-called madman who supposedly had his wife take photos of him holding up the pistol, rifle and Commie newspapers, chest strutting outward. This guy wants to make a big big statement here.
Yet, when he actually does the shooting he wants to hide the gun but forgets to take the shells. Why bother, you know? But I digress. So he wipes down the gun well enough so that nothing is found on the gun. The gun has as sight on it that's not even aligned properly and he had no time to test fire before doing the deed.
Then he puts it between the boxes. Then he goes down and as part of his grand plan to escape undetected, instead of scooting right out the front door, he instead takes a detour to refresh himself by buying himself an ice cold Coca Cola.
If you and many others want to continue to believe that that's what happened that day, wonderful. But the above scenario makes absolutely no sense and goes against all natural inclination of how it was said it went down.
So again you want the simple answer, here it is. No.