Traditional scientific method has always been at the very best 20-20 hindsight. It's good for seeing where you've been. It's good for testing the truth of what you think you know, but it can't tell you where you ought to go. Robert M. Pirsig
Taking this view, it is possible to see financial markets as a laboratory for testing hypotheses, albeit not strictly scientific ones. The truth is, successful investing is a kind of alchemy. George Soros
It's a system for testing your thoughts against the universe and seeing whether they match. Isaac Asimov
To the extent that you can find ways where you're making predictions, there's no substitute for testing yourself on real-world situations that you don't know the answer to in advance. Nate Silver
I know that BMW is now a sponsor of the USOC - of the United States Olympic Committee - so they offer the use of their aerodynamic speed-tunnel for testing and such for the athletes, which is a great advantage. But to be honest with you, I'd rather have a free car! Apolo Ohno
Once the races begin it's more difficult and there is never that much time for testing. Valentino Garavani