Also, I think to execute a short squeeze successfully, it is by no means sufficient that the outstanding short interest exceeds 100% - that boundary has no sign

Also, I think to execute a short squeeze successfully, it is by no means sufficient that the outstanding short interest exceeds 100% - that boundary has no significance. I think what is required is that you control long interest of 100% or more of the net shares (or float). (The shorts being > 100% is neither necessary nor sufficient for that.)