Why USS Thresher's loss remains uncertain

How persuasive is the argument that Thresher remained intact before imploding and did not suffer a seawater-pump failure?

He would need much more engineering and wreck evidence before judging; the available information supports uncertainty rather than a confident conclusion.

The available evidence does not justify choosing between an intact descent followed by implosion and a seawater-pump failure. Deeper technical study of the wreck and engineering data would be needed. Some naval disasters leave more plausible questions than surviving evidence can resolve.