The textbook lists several strategies:

are often available for online viewing or download with a subscription. Commercial Purchase: The text remains available for purchase on platforms like

A low-quality scan is not verified. A legitimate verified PDF has been produced from digital source files or OCR-corrected text, allowing you to search for terms like "backward chaining" or "conflict resolution."

: Multiple users have uploaded the Fourth Edition PDF , though a subscription is usually required for a direct download.

The inference engine repeatedly executes three steps, as detailed in Chapter 5 of Giarratano and Riley (2005):