AHHH I see where he is coming from and that fully supports my claims that he is a student of the technical aspect of mettalurgy rather than the practicing of the results.
When a blade stabs. i mean purely stabs, there is no cutting and a suction is indeed created. NOW, if you move the blade forward and backward it will break that seal as the opening of the wound is "cut" so that it is larger than the blade allowing it to "bleed" around it.
in testing the theory, the testers have ample time to cut the wound out in this fashion and do it as a matter of course without realizing what they are doing. In combat, a soldier does not have the time to perform the extra movements to do this.
However, I will acknowledge that to a degree, both of our arguments are fully valid. Yours from the technical aspect and me from the application aspect. So perhaps we can settle this as us BOTH being right and it being a matter of "the chicken and the egg".