Peter Geach (1972) Logic Matters, Basil Blackwell. Ch.7. "Identity Theory", 238-249. (First published in Review of Metaphysics 21(1), 1967 & 22(3), 1969.) Wiggins, SSR の批判対象のひとつ．さしあたり SEP の "Relative Identity", esp. §5 が参…