What is the procedure for implementing “backward chaining” in Drools?

In “backward chaining”, one must first make a choice and after that check if the choice is valid or not by backtracking through a succession of occasions. For instance in the event that one needs to see whether a specific student has passed the exam or not? At that point, I will take the choice that the student has passed. Then dissect the information by backtracking through the succession of investigation of information. In like manner the decision made is either right or wrong. In light of necessity, both of the two methodologies can be utilized. Sometimes the blend of both forward and backward chaining is additionally utilized. In backward chaining, it is regularly alluded to as induction inquiries and Drools implement it with constructive questions.