From Tapestries MUCK
Returns true if expr1 and expr2 evaluate as true. Otherwise, this returns false. If expr1 was false, this doesn't bother to evaluate expr2, as it does C-style shortcutting.
If there are more than two arguments, then this will evaluate all of them until either one returns false, in which case this function returns false, or until it has evaluated all of the arguments.
This function returns true only if all the arguments evaluate as true.