The symbol "therefore" is composed of three dots in the shape of an equilateral triangle. It is a visual symbol use to complete a point. "Cogito, ergo sum" (Latin: "I am thinking, therefore I exist", ortraditionally"I think, therefore I am") is a philosophical statement by René Desc...
The "therefore" symbol may have stemmed from this process: something is burned, therefore we have a "salt" (as far as alchemy is concerned; not the NaCl kind). Further, the alchemical symbol for salt is in fact a set of three dots. This roughly corresponds to the symbol's significance...