That is a common technique taught in rhetoric and management courses. People are quite fond of their own ideas and implicitly devalue the ideas of others. There

That is a common technique taught in rhetoric and management courses. People are quite fond of their own ideas and implicitly devalue the ideas of others. Therefore, if you don't care about owning an idea but care about getting it done, just talk the leader or the whole group into thinking it was theirs. It is actually quite easy, because most people are sufficiently vain to accept this without resistance.