Speculation
Quotes
Every scientist knows that the best research emerges from a dialectic between speculation and healthy scepticism. Ideally the two should co-exist in the same brain, but they don’t have to. Since there are people who represent both extremes, all ideas eventually get tested ruthlessly.
Vilayanur S. Ramachandran and Sandra Blakeslee, Phantoms in the brain: probing the mysteries of the human mind, New York, 1999, p. xvi