# lab2-prolog - of the rule A comma between two conditions...

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Lecturer: MRs. Aasma Memon @yahoo.com 10 Aasma.MEMON Email: [email protected]

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Atoms, numbers and variables are building blocks for complex terms Complex terms are built out of a functor directly followed by a sequence of arguments Arguments are put in round brackets, separated by commas The functor must be an atom
Examples we have seen before: playsAirGuitar(jody) -listentomusic(mia) The number of arguments a complex term has is called its arity Examples: woman(mia) arity 1 parent(tom,liz) arity 2

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Rules have: 1- A condition part (body) in the right-hand side of the rule. 2- A conclusion part (head) in the left-hand side

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Unformatted text preview: of the rule. A comma between two conditions indicates the conjunction of the conditions, meaning that both conditions have to be true. ?-offspring(Y,X). Y= lists all offspring(child) X=lists all parent  There are five clauses in this knowledge base:  two facts, and three rules .  The end of a clause is marked with a full stop.  happy(yolanda).  listens2music(mia).  listens2music(yolanda):-happy(yolanda).  playsAirGuitar(mia):-listens2music(mia).  playsAirGuitar(yolanda):-listens2music(yolanda). There are three predicates in this knowledge base: happy, listens2music, and playsAirGuitar...
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