How deep does the simulation go?
Does the simulation fit out identities - our true selves - as well as it does our thinking, our bodies, the whole universe?
Is the simulation on computers of the future rather than computers of the past?
If it is on computers at all, are the computers real, or are they simulations, as well?
When you consider cause and effect, everything works according to the laws of physics, exactly and precisely. Even the indescribable pandemonium of the component subatomic parts of the fusion of a star, or similar in an electric plasma, all act exactly according to the laws of physics.
The sparks that jump in the synapses in our brains and nerves all act exactly according to the laws of physics. There is no random whatsoever... at least not that has been proven, or even shown when you get right down to the basics. Everything that is random exists because of our ignorance in understanding things.
Odds are that this is all a simulation... except for the core of out soul or inner identity.