One can't predict the weather more than a few days in advance.
There is no physical law precluding particles from being organised in ways that perform even more advanced computations than the arrangements of particles in human brains.
Cosmology is a rapidly advancing field.
My advice to other disabled people would be, concentrate on things your disability doesn't prevent you doing well, and don't regret the things it interferes with. Don't be disabled in spirit as well as physically.
Before 1915, space and time were thought of as a fixed arena in which events took place, but which was not affected by what happened in it. Space and time are now dynamic quantities... space and time not only affect but are also affected by everything that happens in the universe.
There is no heaven or afterlife for broken-down computers; that is a fairy story for people afraid of the dark.
I regard the brain as a computer which will stop working when its components fail. There is no heaven or afterlife for broken down computers; that is a fairy story for people afraid of the dark.
I'm never any good in the morning. It is only after four in the afternoon that I get going.
Success in creating AI would be the biggest event in human history. Unfortunately, it might also be the last, unless we learn how to avoid the risks.
As scientists, we step on the shoulders of science, building on the work that has come before us - aiming to inspire a new generation of young scientists to continue once we are gone.
I want my books sold on airport bookstalls.
If aliens visit us, the outcome would be much as when Columbus landed in America, which didn't turn out well for the Native Americans.
To my mathematical brain, the numbers alone make thinking about aliens perfectly rational. The real challenge is to work out what aliens might actually be like.
I believe alien life is quite common in the universe, although intelligent life is less so. Some say it has yet to appear on planet Earth.
I have wondered about time all my life.
I can't say that my disability has helped my work, but it has allowed me to concentrate on research without having to lecture or sit on boring committees.
However difficult life may seem, there is always something you can do and succeed at.
Imaginary time is a new dimension, at right angles to ordinary, real time.
People won't have time for you if you are always angry or complaining.
I am just a child who has never grown up. I still keep asking these 'how' and 'why' questions. Occasionally, I find an answer.