It is not a matter of "logic". It is a matter of evidence. The evidence is that JFK and JBC are reacting at the same time although it does appear that JFK began reacting before he appears from behind the sign. But the evidence is also that JFK reacted to being hit on the first shot while JBC reacted to hearing it and fearing an assassination was unfolding. The evidence also is that the last two shots were close together with the second shot sounding after the mid point between 1 and 3.
As far as the supposed lapel flip is concerned, how do you explain the similar appearance of the jacket in z222 and z224? On what basis can you eliminate movement of the right arm across his front as the cause of the jacket movement? His right arm is certainly moving there.
"It is not a matter of "logic". It is a matter of evidence."I like the way you've separated "logic" and "evidence", it is something represented in a lot of your arguments.
In my post I have applied logic to a very powerful piece of evidence, actual video footage of the moment JBC is shot through the chest.
This piece of evidence is, in my opinion, far more significant than witness testimony which can be totally unreliable. It is this contradictory and unreliable aspect of witness testimony that many "researchers" use to prop up their treasured arguments, no matter how wild.
Let's have a look at the close up again:

Because you will not relinquish your debunked shot at z271 you cannot have a shot passing through JBC at this point. The movement of his jacket is unbelievably rapid and significant. The radical difference between the two jacket positions occurs in 55 milliseconds - this is the point - any explanation must take into account the profound rapidity of the jacket which is why 'the wind' explanation fails.
So how can you explain this movement:
"On what basis can you eliminate movement of the right arm across his front as the cause of the jacket movement? His right arm is certainly moving there."JBC's right arm is not moving across his front at this moment, that is something you've invented in a desperate attempt to explain the incredibly rapid movement of JBC's jacket.
The frame below is z223:
how to divide workoutsThis is how JBC is sat as the limo passes behind the Stemmons sign. There is no movement of his arm, no rapid movement and no movement across his front.
At z225 JBC's right arm starts to suddenly thrash around - a result of being shot and not, as you would have us believe, because he was concerned for the President.
You can twist witness evidence all you want but you cannot explain away the evidence you can see with your own eyes in this instance.