Key points are not available for this paper at this time.
Journal Article Logic and Truth in Frege Get access Thomas Ricketts, Thomas Ricketts Search for other works by this author on: Oxford Academic Google Scholar James Levine James Levine Search for other works by this author on: Oxford Academic Google Scholar Aristotelian Society Supplementary Volume, Volume 70, Issue 1, 1 July 1996, Pages 121–176, https://doi.org/10.1093/aristoteliansupp/70.1.121 Published: 30 July 2015
Ricketts et al. (Mon,) studied this question.