Knowledge is well described (not necessarily explained, but described) in information theory. Intelligence, sentience, consciousness, even whether something is alive, are fuzzy concepts.
Biology has a working definitions of "living organism" that includes a way to calculate likelihood that something is a living organism, but it still is probabilistic.
Understanding is another concept that depends on philosophy of the mind as opposed to concrete physical processes.
Biology has a working definitions of "living organism" that includes a way to calculate likelihood that something is a living organism, but it still is probabilistic.
Understanding is another concept that depends on philosophy of the mind as opposed to concrete physical processes.