hypothetical

nouns

a hypothetical possibility, circumstance, statement, proposal, situation, etc.
"consider the following, just as a hypothetical"
is a type of (narrower)
a tentative insight into the natural world; a concept that is not yet verified but that if true would explain certain facts or phenomena
"a scientific hypothesis that survives experimental testing becomes a scientific theory"; "he proposed a fresh theory of alkalis that later was accepted in chemical practices"

adjectives

based primarily on surmise rather than adequate evidence
"theories about the extinction of dinosaurs are still highly conjectural"; "the supposed reason for his absence"; "suppositious reconstructions of dead languages"; "hypothetical situation"
is derived from