Although the experience knowledge, which is obtained by induction based on data, is important and is utilized in planning process, sometimes, the utilization of inductive inference causes a logical inconsistency. We show an example problem on the fire compartment formed by many shatters. This type of inconsistency may occur, when the induction is used jointly with deduction, and this inconsistency is called the inductive inference inconsistency.
Mechanism of the generation of the inductive inference inconsistency is clarified.
As method for avoiding the inductive inference inconsistency, we propose 1) a method from a view point of logic and 2) methods from a practical viewpoint.