This entry was published at least two years ago (originally posted on October 2, 2018). Since that time the information may have become outdated or my beliefs may have changed (in general, assume a more open and liberal current viewpoint). A fuller disclaimer is available.
Old-school geeks will (well, maybe) be amused by this: a very simple, very stupid, tiny iOS 12 Siri shortcut. Tap it in Shortcuts and Siri will reply with, “Nothing happens.” Or if you set it up to respond to your voice, you can say “XYZZY” and she’ll say, “Shortcuts says: ‘Nothing happens.’ Done!”…which is less than ideal, but seems to be how it works. The joke is still there, at least.
(If you don’t get the joke, this might help.)