Synonym with “conditional sentence” or “conditional proposition”. A hypothetical proposition is an if… then… statement. See conditionals in Greek.
If you study your Greek, then you will be a more accurate expositor of God’s word.
The “if…” clause is the protasis or the antecedent; The “then…” clause is the apodosis or the consequent. At the heart of every hypothetical syllogism, there is a hypothetical proposition.