Enter a clue or pattern or both:
Therefore, to Tiberius (4 letter answer)
The answer ERGO is seen frequently, appearing about once every 60 puzzles.
As a result
"Cogito ___ sum"
"Cogito, ___ sum"
"It follows that ?"
Word in a syllogism
"Cogito, ___ sum": Descartes
It follows a premise
So it follows that
"Tantum ___" (part of a Eucharist hymn)
ERGO as an adverb:
1. (used as a sentenced connector) therefore or consequently