Grandmother (X, Y): - Mother (X, Z), parent (Z, Y). The first three descriptions of the program are Prolog facts that represent known facts. The symbols mona, marge, bart, and lisa are constant symbols. The symbols of mother, parent, grandmother are predicate symbols. The fourth and fifth lines are the rule that the symbols X, Y, Z are variables. With first-order logic, variables can be replaced with constant symbols. In the higher-order logic described later, variables can also be replaced with predicate symbols. In the "Simpsons" example, the first rule indicates that X is the parent of Y if X is the mother of Y. In the second rule, if X is the parent of Z and Z is the parent, X is the grandfather of Y. Huh
When translating the above Prolog rule into English, X, Y and Z are variables, "X is a brother of Y, Z is parent of X, and Z is parent of Y". However, this rule also defines a child as his brother. To solve this problem, we must add that X and Y are different. The modified version is as follows. Boolean constants are usually passed as propositions, not as arguments. Continuous failure helps to force all solutions to be generated. Variables are strings that begin with an uppercase letter. An atom is a quoted string or an unquoted string beginning with lowercase letters.
Here are some very special things. Almost all triples are on a very small subset of real space on diagonals from x, y, z = 0 to x, y, z = 1. Where x, y, z are green. It is clear that the strength of the channel 3 pels green intensity is strongly related to each other for every triplet state. Triples that are not online are rarely part of the actual image. In the above example, only 3 pixels are used, but the basic idea is that the image is arranged in only a small part of the real space and it is suitable for images of all sizes. In larger spaces, the relationship becomes nonlinear, but since many features are highly correlated with one another, the fact remains unchanged. Words in sentences obviously depend on their neighbors, the majority of the randomly generated music sounds badly, not at all harmonious.