  What was crucial in the emergence of twentieth-century analytic  philosophy, however, was the development of quantificational theory,  which provided a far more powerful interpretive system than anything  that had hitherto been available. In the case of Frege and Russell,  the system into which statements were ‘translated’ was  predicate logic, and the divergence that was thereby opened up  between grammatical and logical form meant that the process of  translation itself became an issue of philosophical concern. This  induced greater self-consciousness about our use of language and its  potential to mislead us, and inevitably raised semantic,  epistemological and metaphysical questions about the relationships  between language, logic, thought and reality which have been at the  core of analytic philosophy ever since.