Permissible Quotes (4 quotes)
[On the use of scopolamine in criminology], If it is permissible for a state to take life, liberty and property because of crime, it can be made legal to obtain information from a suspected criminal by the use of a drug. If the use of bloodhounds is legal, the use of scopolamine can be made legal.
I would beg the wise and learned fathers (of the church) to consider with all diligence the difference which exists between matters of mere opinion and matters of demonstration. ... [I]t is not in the power of professors of the demonstrative sciences to alter their opinions at will, so as to be now of one way of thinking and now of another. ... [D]emonstrated conclusions about things in nature of the heavens, do not admit of being altered with the same ease as opinions to what is permissible or not, under a contract, mortgage, or bill of exchange.
Knowledge is a matter of science, and no dishonesty or conceit whatsoever is permissible. What is required is definitely the reversehonesty and modesty.
The great mathematician fully, almost ruthlessly, exploits the domain of permissible reasoning and skirts the impermissible. [I]t is hard to believe that our reasoning power was brought, by Darwins process of natural selection, to the perfection which it seems to possess.