Philosophy of Language
Like much philosophical discussion during his time in England, Crathorn considered the linguistic aspects of science. He questioned whether that when we know something scientifically, is that knowledge about external things, propositions, or some other more complex thing. It is believed that Crathorn popularized the notion that neither the external aspect or the proposition is the proper object of science, that the "total significance" of the proposition is most important.
He also discussed the nature of mental language, namely whether it is conventional or natural. Crathorn's predecessors had argued that thinking occurs in a universal language of concepts acquired causally via experience, and that all conventional languages are subordinated to this mental language, which is shared by everyone in an a priori fashion. But Crathorn could not accept such a position because of his view that only qualities are natural signs of their extra-mental significates. Crathorn argued that except for natural signs of qualities, mental language is conventional because it is derived from conventional language. Hence, whatever language one speaks in his head is modeled on that language used for external communication. Crathorn was the revolutionary in his time to affirm that words are prior to ideas and that ideas are shaped by words.
Read more about this topic: William Crathorn
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