[2 mod 0 eq?] [even?]         def
[2 mod 1 eq?] [odd?]          def
[mod 0 eq?]   [divisor?]      def
[true]        [otherwise]     def
[any not]     [none]          def
[eq?]         [equal?]        alias
[neq?]        [not-equal?]    alias
[neq?]        [inequal?]      alias
[gt?]         [greater?]      alias
[gt?]         [greater-than?] alias
[lt?]         [lesser?]       alias
[lt?]         [less-than?]    alias