A few notes:

• Moral relativism and metaethics in general is unrelated to the scientific method, I hope you can figure out why and maybe discuss it the next time.

• You appear to make a sharp division between you (the enLWightened) and "them" (the unwashed). Given that "the need to detect [the biases] in ourselves", how much effort and time have you put into describing your own experiences?

• Given the apparent failure of this last class, can you identify your personal bias or a fallacy which resulted in you being blindsided by this failure?

• Consider starting small, with short, clear and engaging examples, like the Newcomb's problem, the PD or the Trolley problem, or the Milgram or Stanford experiments

• A common problem of novice instructors is to cram a lot more material in one class than the students can conceivably absorb. This is because we tend to underestimate how hard something is to learn after we internalized it. After all, it looks so clear now! Consider reducing the amount of material you plan to present and go over more examples instead.

• If you know your audience well, consider modeling their reactions to what you say, given their level of understanding, interest and skepticism, then plan for contingencies, like how to get a sidelined discussion back on track without being heavy-handed.

Good luck!