I'd guess he reasoned out the probabilities based on the evidence available to him at the time, and concluded that the probability of benefit outweighed the probability of harm. Of course, he might have decided that he already knew everything already -- plenty of people take that approach.
I'd guess he reasoned out the probabilities based on the evidence available to him at the time, and concluded that the probability of benefit outweighed the probability of harm. Of course, he might have decided that he already knew everything already -- plenty of people take that approach.