The future, according to some scientists, will be exactly like the past, only more expensive.

R-4 got stuck on the First Law. "Can anyone really protect a human being from all harm whatever?" it thought. "No. It is inevitable that all humans must be injured, contract illnesses and ultimately die. The future can only be averted for humans who are already dead. Ergo..." It took a dozen cops to subdue R-4, after his blood orgy in a department store (83 dead, none injured).

People have laughed at all great inventors and discoverers.

I found some time ago that I have to be careful, while working on a novel, what I read.

We didn't have a phone when I was a kid, and I was too shy to smash any public phones, and our town didn't have a pool hall either, so I had to hang out at the public library - and anyway, I told myself stories.

Anything can happen in SF. And the fact that nothing ever does happen in SF is only due to the poverty of our imaginations, we who write it or edit it or read it. But SF can in principle deal with anything.

SF has at least the advantage of not depending on preconceptions.