I followed James Sass's links and found a chart which described in terms of seconds how long it would take a person to bleed to unconsciousness if cut in different places/arteries.
Sobering.
Surprising.
Relevant to this discussion.
I have two knives which one could call self-defense knives, and only one of them qualifies by size (small) for daily carry.
Looking at the bleed-out chart, I noticed the vulnerability of the sub-clavicle artery, and that it would take a stab to reach it; a stab for which my Greco Persian seems particularly suited in the reverse or ice-pick grip.
I also noticed the extreme vulnerability of the brachial artery, and its accessiblity to a slash even by my 2.5" Native.
Scary stuff.
Going back to the stabbing thing, though, I find everyone's input valid.
The distinction between stabbing, slashing and hacking, which has started to come into focus for me as the result of this discussion, has to do with ease of application, timing and rhythm (efficiency?); and not so much the effectiveness of a delivered stab, slash or hack.
As a measure of efficiency, I imagine myself standing flat-footed, square to the aggressor, with blade in hand but not raised or poised in any particular posture of unusual readiness.
I paint this word picture for the purposes of comparing efficiency and not as a suggestion that anyone should stand this way when confronted by an aggressor.
In any event, to stab someone requires only a single forward movement towards a large, general target; it could involve skill if the defender had to direct the "poke" through or around guarding hands and arms, but not much skill.
To slash effectively requires a target, a small target, and two movements; the first movement to the target and the second movement in a draw cut.
Yes, a person can make a single-movement general slash, in what one would call in tennis a "forehand."
This would require a step with the diagonally opposing foot, say a step with the left foot for someone holding a knife in the right hand, and the cut would progress from outward to inward, which presents few really vulnerable targets other than the knee and the side of the neck.
Generally, the fight-stopping slash requires two initial movements and then a succession of movements which hopefully will have a cumulative effect.
In order to hack, the defender must raise the blade to a beginning position, lead with his elbow and, again, step with the diagonally opposing foot.
The defender must also have proper distance.
Somone attacking through this defense can do so by moving inside the arc of the blade and/or controlling the weapon elbow.
It requires very little force applied to the weapon elbow to cause the blade to miss its mark.
Raising a blade to the beginning position for a hack also opens up the defender to either a jab to the nose or a jujitsu/wrestling takedown.
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This said, I find myself thinking of my mental picure of the "original Bowie knife".
Yes, we can only speculate regarding the "original Bowie knife".
However, one very good candidate for the title "original Bowie" would have worked best if held in an edge-up grip, with the "clip" down.
An edge-up grip allows for a single-movement slash, especially to the inside of the agressor's thighs (femoral artery) and groin, as well as a backhand upward-flip to the agressor's neck by the defender.
My candidate for "original Bowie" does not have a traditional crescent-shaped clip, but a straight clip from spine to point.
Imagine hitting someone in the head with either the last four sharpened inches (clip) of the blade or with the unsharpened, downward-held heavy spine.
With my candidate for "origianl Bowie," if one draws a line from the butt of the handle through the center of the guard, the line continues forward to the very sharp point of my "original Bowie," making it a perfect for thrusting.
When we hold this Bowie in our modern way of holding it, edge-down, it appears to sweep upwards in a really strange and awkward manner.
However, if we hold it edge-up, the sharpened clip fall below the center-handle line, about where one would find the leading edge of a Kukri.
So, with this knife, one could slash upwards into the groin or neck, and, continuing or following through, the blade would come up to a raised hacking position, ready for a downward blow to the head, shoulder or neck, and then to a final jab.
Bowie presented Black with a design that Bowie wanted made.
We think that design, following the pattern of a knife designed and made by his brother Rezin and used by James Bowie at the Vidalia Sandbar Fight, resembled a large, heavy Chef's knife.
Black made two knives; one to Bowie's design and one to Black's own design.
Bowie chose Black's design over his own.
I think Bowie used it edge up and clip down so that he could slash, hack and stab with maximum speed and effect.
Talk about yer digression.