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Pn'n'sc'y 3

come to scientific theory, it is insufficient and must
be subjected to criticism. That criticism has, however, unfortunately
hitherto yielded the only doubtful and actually
much doubted results. Yet without it, all scientific conclusions
are uninsured against disastrous fallacies. It must be
completely done over again with the utmost thoroughness, that
is, no step must be taken without first thoroughly considering
the proper method to be pursued; and so on until we reach
(as we probably may) a point at which the results of all further
questioning along that endless line can be foreseen evidently
foreseen, and its limiting upshot ascertained. That [upshot?] study
by which that upshot is to be so ascertained that all men must assent to it, will consti-