If your argument is that no dog locks their jaws on their prey, then maybe we are arguing symantics here. Bite and hold on under duress is what I mean by lock on. Pits can or cannot do this? I say they can, do and have. I also say this ability has likely caused their popular bad rap and may have influeneced their use/training as fghting dogs.
If I'm wrong, please point out specifically how I am so I can better educate myself on the topic.