I get hat isa/2 is a rule, that takes two objects or terms. But what would isa2/2 imply? That isa is defined twice?
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I get hat isa/2 is a rule, that takes two objects or terms. But what would isa2/2 imply? That isa is defined twice?
isa2/2simply refers to a predicate namedisa2taking 2 arguments, i.e. the first 2 is simply part of the name, not a special notation.