A priori hypothesis is one that is formulated before a research investigation is conducted. A priori hypotheses are distinct from a posteriori hypotheses, which are formulated after the occurrence of an observable phenomenon.
These hypotheses are typical of the scientific method in that they are formulated based on previously assumed conclusions. These hypotheses are derived from the aforementioned assumptions. A hypothesis produced “a posteriori” is based on induction. It begins with an empirical observation and then seeks to theorise the observation’s underlying explanation.