When two questions are glued together with and, both sides of the and have to be'true 'in order to result in'true'. An example: $a = 1 $b = 5 if (($a & lt; 10) and ($b == 5)) and ($a & lt; $b) {print "hello"} In this example you see a glued question glued onto an other question.
Se un dos lados é "certo" a resposta será "certo"