The answer is "Backward chaining".
Backward chaining is a deduction technique generally utilized as a part of man-made reasoning, computerized hypothesis provers and evidence associates. Backward chaining approach can be portrayed as working again from an objective. It's a standout amongst the most ordinarily utilized strategies for prevailing upon impedance rules and intelligent implication. Backward chaining works in reverse from a rundown of objectives to decide if there is any information to help them.