τεκμήριον

From τεκμαίρομαι (tekmaíromai, “to make a conjecture”) +‎ -ιον (-ion).

τεκμήρῐον • (tekmḗrĭon) n (genitive τεκμηρῐ́ου); second declension (Attic, Ionic, Koine)

1. proof (through argument)
   • 4th century BC, Isaeus, Nicostratus 12:

     ἐν μόναις δὲ ταῖς τῶν κλήρων εἰσαγωγαῖς δοκεῖ μοι προσήκειν τεκμηρίοις μᾶλλον ἢ μάρτυσι πιστεύειν.

     en mónais dè taîs tôn klḗrōn eisagōgaîs dokeî moi prosḗkein tekmēríois mâllon ḕ mártusi pisteúein.

     • 1962 translation by Edward Seymour Forster

       It seems to me that in suits concerning inheritances, and in these alone, more credit ought to be given to circumstantial proof than to the statements of witnesses.

2. (logic) demonstrative proof
   • 384 BCE – 322 BCE, Aristotle, Problems 70b.2
   • 384 BCE – 322 BCE, Aristotle, Rhetoric 1.3.7:

     τὰ γὰρ τεκμήρια καὶ τὰ εἰκότα καὶ τὰ σημεῖα προτάσεις εἰσὶν ῥητορικαί

     tà gàr tekmḗria kaì tà eikóta kaì tà sēmeîa protáseis eisìn rhētorikaí

     for proofs and probable propositions and probable arguments are propositions of rhetoric

• τεκμηριόω (tekmērióō)

• Greek: τεκμήριο (tekmírio)

• “τεκμήριον”, in Liddell & Scott (1940) A Greek–English Lexicon, Oxford: Clarendon Press