"Names and verbs by themselves, when nothing is added, are like thoughts without combination and separation, since they are not yet true or false. A sign of this is the fact that 'goatstag' signifies something but is not yet true or false unless 'is' or 'is not' is added, either without qualification or reference to time."
-De Interpretatione 16a15-20
Notice that truth and falsity do not apply until 'is' is added. In other words, truth and falsity are said only when being is predicated. Truth is Being considered differently.