Welcome, time-travelers!
This is the part where we tell you about the most efficient methods for checking your reality.
Quickly blink your eyes 5 times and check for any unusual side effects. If your vision blurs or your eyelids feel like they're made of lead, you're probably in a simulation.
Try to remember your childhood. If you're unable to recall your favorite cartoon from when you were six, you might be a simulation.
Jump off a building. If you survive with no injuries, you're probably in a simulated reality.