Exactly. I feel absolutely certain that it was sabotage. But the presence of unknown military ships doesn't prove it. That is very strong evidence but techn

Exactly. I feel absolutely certain that it was sabotage. But the presence of unknown military ships doesn't prove it. That is very strong evidence but technically it could be a freak coincidence. The stronger proof is the condition of the pipes, obviously sabotaged. That's evidence strong enough to reasonably call "proof."