He was struggling not to allow into his mind the thought that was pressing against its periphery: What were the chances and how long would it take-according to the mathematical theory of probability-for primitive men, working by rule-of-thumb, to hit the right combination of parts and re-create the motor of this engine?
There are no more uses of "rule of thumb" in the book.
Show samples from other sources
As a rule of thumb, we estimate that employees cost 150% of their hourly wage.
As a first rule of thumb, therefore, you can tell a true war story by its absolute and uncompromising allegiance to obscenity and evil.