The Infinite Regress of Actualizers

All change is caused by something already actual. This means either there is an infinite regress of actualizers, or there is a purely actual actualizer. The most important terms in the argument that you need to understand are actuality and potentiality. If my coffee is actually cold, it's also potentially hot. Something must actualize the potential for it to be hot, like a microwave. It can't become hot on its own. Alex offers three objections to this particular argument. But let's take a look at them.