I don’t think this is 100 percent airtight Kantian philosophy, but hey, it’s decent enough for three minutes.

As one YouTube commenter pointed out in the ax murderer example given here, presumably, given Kant’s moral imperative, the ax murderer would not choose for the victim to then go to his own house and slaughter his family as if that too was one of the “universal laws of nature” that everyone should follow.

Credit to CollegeBinary for the video.