some predicate &rest sequences+    result

notevery predicate &rest sequences+    generalized-boolean

notany predicate &rest sequences+    generalized-boolean

sequence - a sequence.

result - an object.

generalized-boolean - a generalized boolean.

Predicate is first applied to the elements with index 0 in each of the sequences, and possibly then to the elements with index 1, and so on, until a termination criterion is met or the end of the shortest of the sequences is reached.

every returns false as soon as any invocation of predicate returns false. If the end of a sequence is reached, every returns true. Thus, every returns true if and only if every invocation of predicate returns true.

some returns the first non-nil value which is returned by an invocation of predicate. If the end of a sequence is reached without any invocation of the predicate returning true, some returns false. Thus, some returns true if and only if some invocation of predicate returns true.

notany returns false as soon as any invocation of predicate returns true. If the end of a sequence is reached, notany returns true. Thus, notany returns true if and only if it is not the case that any invocation of predicate returns true.

notevery returns true as soon as any invocation of predicate returns false. If the end of a sequence is reached, notevery returns false. Thus, notevery returns true if and only if it is not the case that every invocation of predicate returns true.

 (every #'characterp "abc")  true
 (some #'= '(1 2 3 4 5) '(5 4 3 2 1))  true
 (notevery #'< '(1 2 3 4) '(5 6 7 8) '(9 10 11 12))  false
 (notany #'> '(1 2 3 4) '(5 6 7 8) '(9 10 11 12))  true 

Other exceptional situations are possible, depending on the nature of the predicate.

 (notany predicate {sequence}*) ==(not (some predicate {sequence}*))
 (notevery predicate {sequence}*) ==(not (every predicate {sequence}*))