The wiki article on vacuous truth says:
a vacuous truth is a conditional or universal statement that is only true because the antecedent cannot be satisfied.
I'm familiar with identifying the antecedent and consequent in a conditional, but I'm unsure what part of a universal proposition would be the antecedent.
The article gives the following example:
For example, the statement "all cell phones in the room are turned off" will be true when there are no cell phones in the room.
Would the subject class "cell phones in the room" be the antecedent since it being empty results in the statement being true? In general, is the subject class the antecedent in a universal?