Checks if all items are true.
The items are checked left-to-right and are not evaluated beyond the first false item.
See the first example for how this is useful.
(list length([6, 7]) >= 2) & (element([6, 7], 2) = 5)→falseWill not cause an error because list size is checked before getting the item.
("a" = "a") & ("a" <> "b")→true
true & true & false→false