After I posted about "deixis", into my mind unbidden popped the word "apodeixis".
"Rhetoric has borrowed from dialectic several terms relating to argumentation, including pistis (proof), apodeixis (logical demonstration), and enthymeme (informal reasoning)."
The word "pistis" is also interesting. I wonder if French "piste" which my dictionary defines as "a ski run of hard packed snow" but I remember as meaning "the track of a hunted animal" (or crimial).
Another corny joke. Railroad dick stops a man for walking on the tracks. Man says he is looking for the railroad president. "You won't find him here." "No, but I'm on his track."