These relay stations are actually special-purpose email servers. They are used to relay spam from the spam's originator so that the originator cannot be traced.

Why should I agree that a twiddle of skirts from right to left and pointing a toe in one direction mean “ He loves me,” while the reverse twiddle and the toe pointed in the opposite direction "He loves me not”?

The dead--in holy, stilly peace, the sacred dead repose, Afar from earth's turmoil and grief, and all of sick'ning woes; From racking pain, and withering pride, and avarice's care, Secure they rest in solitude, unaw'd by sin or snare.

The ideal of uncontroversial checkability of mathematical arguments, however, seems to be related to formal derivations rather than scribblings on napkins.