Hypothesis may be the word you are looking for.
Assumption.
Hypothesis
The word hypothesis is another word for an educated guess.Similar terms include theory and speculation.
hypothesis or a type of speculation
prediction.
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 estimate is one, particularly when there are facts or figures. Another word would be a hypothesis, and it is used more in a scientific context.
What a silly question! Look up the word 'hypothesis' and then ask it another way.
Hypothesis
The Latin word for Hypothesis is Positum.