More along the lines that if you don't disclose how you do the illusion you can't prevent other people from publishing write-ups or selling kits to do something

More along the lines that if you don't disclose how you do the illusion you can't prevent other people from publishing write-ups or selling kits to do something similar. Then magic tricks can all be patented, and protected for the life of the patent. Interested amateurs can look up the patents, but magicians can rest assured that few in their audience will take that step. Seems like a perfect tradeoff to me.