Default Logic

Default logic is a method in artificial intelligence and logic that allows systems to make reasonable assumptions in the absence of complete information. It provides rules called "defaults" that suggest typical or likely conclusions, which can be overridden if different evidence appears. For example, one might default to believing "birds fly" unless there's specific evidence that a particular bird cannot fly. This approach enables reasoning that is flexible and aligns with everyday human decision-making, handling typical cases efficiently while still accommodating exceptions when they arise.