(id and)
(args expr ...)
(description "True iif every expr is true. [SRFI 0]")

(id not)
(args expr)
(description "True iif expr is false. [SRFI 0]")

(id or)
(args expr ...)
(description "True iif at least one expr is true. [SRFI 0]")

(id library)
(args name)
(description "True iif library name is importable. [R7RS]")

(id compilation-target)
(args target ...)
(description "True iif at least one target is supported. [Gambit]")