We live here on Earth, together with billions of fellow human beings. That we live is an irrefutable empirical fact. Similarly, the fact that other people live on Earth, too, is also an empirical fact. We do not merely live, however, but we are also personalities.
We are personalities who are similar to each other in various respects, and largely different from each other in other respects. That we are personalities, different from each other is also an empirical fact for us. Out of these two experiences, however, only one is true, the other is deception.