Now in order to actually fully understand what the product rule tells us, we have to define what it means for two or more events to be independent of one another. So to demonstrate the independence of events, let's actually use the following coin. So we're going to flip a coin twice. So our two events is coin flip number one and coin flip number two. Now before I actually make the flip, what exactly is the outcome of event number one? Well, there are two possible outcomes.