Dilbert: I predict fusion power will be a big deal in fifteen years.
Man: Fusion reactors are impossible to build and always will be.
Dilbert: Then why are a dozen startups working on it?
Man: Everyone who ever tried to create a fusion reactor has failed so far.
Dilbert: Thomas Edison failed many times at making a useful incandescent light bulb before he succeeded. Would you have advised him to give up after the first ten failed attempts? I eagerly await your irrational response.
Man: Incandescent bulbs are bad for the environment.
Dilbert: And there it is.