Scott Alexander uses three fictional stories to illustrate principles of non-empirical scientific reasoning, ultimately applying them to support the many-worlds interpretation of quantum mechanics.

Scott Alexander argues that non-empirical reasoning, based on principles like simplicity and elegance, is a necessary and legitimate part of scientific practice, even for evaluating seemingly untestable theories.

Scott Alexander's experiment tested how different essays affect people's concerns about AI risk, finding a modest but persistent increase in concern after reading.

Scott explores the implications of Sean Carroll's argument against the simulation hypothesis, suggesting that our inability to explain consciousness might indicate we're in a 'ground-level' simulation.