assumption, theory, basis, belief, axiom, explanation, demonstration, guess, layout, plan, philosophy, speculation, supposition, surmise
Hypothesis
prediction
Assumption.
Hypothesis
Hypothesis
hypothesis
hypothesis or a type of speculation
prediction.
Hypothesis may be the word you are looking for.
rumor speculation hypothesis
Another word for 'hypothesis' is an educated guess, which is essentially what a hypothesis is. It is a guess taked from what you assume will happen, given your current knowlege.
An alternative word for guess would be hypothesis if you want to get formal.