There are two common definitions of induction. Defined as the method of drawing general conclusions from individual premises; According to this definition, it includes simple enumeration induction, complete induction, scientific induction, elimination induction by John Mill and Wright, inverse reasoning and mathematical induction. The second definition is the method of drawing conclusions from individual premises or probabilities; According to this definition, it includes simple enumeration induction, elimination induction by John Mill and Wright, backward deduction and analogy, but it does not include complete induction, scientific induction and mathematical induction.