(Internet, humorous) Unless one can provide the proof that one is requesting, that person has no credibility in the matter.

plural of magnetothermopower

A free peasant (as opposed to a serf) of the lowest rank, below an earl and a thane; a freeman; also (more generally), a person without royal or noble status; a commoner. / A bondman or serf.

Third-person singular simple present indicative form of proselytise