"When you act upon a hypothesis which you know to be uncertain, your action should be such as will not have very harmful results if your hypothesis is false. In the matter of the picnic, you may risk a wetting if all your party are robust, but not if one of them is so delicate as to run a risk of pneumonia Or suppose you meet a Muggletonian, you will be justified in arguing with him, because not much harm will have beer done if Mr Muggleton was in fact as great a man as his disciples suppose, but you will not be justified in burning him at the stake, because the evil of being burnt alive is more certain than any proposition of theology. Of course if the Muggletonians were so numerous and so fanatical that either you or they must be killed the question would grow more difficult, but the general principle remains, that
an uncertain hypothesis cannot justify a certain evil unless an equal evil is equally certain on the opposite hypothesis." (Bertrand Russell, "Philosophy for Laymen")
http://evans-experientialism.freewebspace.com/russell03.htmCould you please rephrase the blue sentence?
Thank you.
Cadzao