You can't draw any conclusions from evidence if you claim the evidence was
fabricated. Do you accept the legitimacy of the Zapruder film or do you
believe it was altered? It can't both be a forgery and legitimate
evidence. Right? So which is it?
>
> Regarding what caused the second movement forward you should be able to
> figure that out yourself by looking at the z film. The head was measured
> from the back of the seat. When JFK was struck in the head the second
> time from the left front, once again we have an over extension of the
> head but this time to the left and to the rear. The forward movement of
> the head was a reaction to that over extension.
In the above, you are assuming what you need to prove when you write "When
JFK was struck in the head the second time from the left [sic-right]
front".
You need to establish that, not just assume it.
You can't use the Z-film to establish it if you're claiming it's not
legitimate.
You need to eliminate the other potential causes:
1. The jet effect as discussed in the link above.
2. A neuromuscular reaction to the President's brain being blasted out.
3. The rebound effect - the President's head is pushed forward as far as
it can go, and the chin gets compressed against the chest, and then the head
rebounds backward, taking the body with it.
>
> That graph shows the extreme acceleration that JFK's HEAD suffered.
> First to the front, then rebound to the rear, then hit by an shot from
> the left front , over extending the head to the rear and then the
> rebound back to the front.
You are back to attributing the motion to a shot, but not eliminating the
other causes:
There are several scientific alternatives beyond a bullet strike that have
been proposed over the years for the change of direction, none of which
have been eliminated by conspiracy advocates:
1. The jet effect as discussed in the link above.
2. A neuromuscular reaction to the President's brain being blasted out.
3. The rebound effect - the President's head is pushed forward as far as
it can go, and the chin gets compressed against the chest, and then the
head rebounds backward, taking the body with it.
4. The back brace held JFK upright, preventing him from falling forward
and making him rebound back.
Tell me how you eliminated the other causes.
>
> If they had made an additional measurement, with the lower back, it
> would have told the complete story....
Josiah Thompson's book SIX SECONDS IN DALLAS published the measurements in
1967... What's keeping you from making your own?
>
> A measurement of the lower back would not have anywhere near that kind
> of acceleration while the head did.
>
> That curve shows that JFK was struck by two bullets in the head.
No, that's the *assumption* on your part - based on what you claim is a
faked film. Tell me you understand the problem with that approach.
How did you eliminate the other proposed causes (my initial question,
still unanswered):
1. The jet effect as discussed in the link above.
2. A neuromuscular reaction to the President's brain being blasted out.
3. The rebound effect - the President's head is pushed forward as far as
it can go, and the chin gets compressed against the chest, and then the
head rebounds backward, taking the body with it.
4. The back brace held JFK upright, preventing him from falling forward
and making him rebound back.
Hank