One might think this means that imaginary numbers are just a mathematical game having nothing to do with the real world. From the viewpoint of positivist philosophy, however, one cannot determine what is real. All one can do is find which mathematical models describe the universe we live in. It turns out that a mathematical model involving imaginary time predicts not only effects we have already observed but also effects we have not been able to measure yet nevertheless believe in for other reasons. So what is real and what is imaginary? Is the distinction just in our minds?

The human failing I would most like to correct is aggression.

Plagiarism saves time.

I enjoy all forms of music - pop, classical and opera.

I like physics, but I love cartoons.

There is nothing bigger or older than the universe.

Theology is unnecessary.