Lewis mildly preferred S2 over the others; the amended modal system of "A Survey" was S3, but it is S4 and S5 that have generated sustained interest, mathematical as well as philosophical, down to the present day.
But it is S4 and S5 that have generated sustained interest, mathematical as well as philosophical, down to the present day. Lewis mildly preferred S2 over the others; the amended modal system of "A Survey" was S3.
Lewis mildly preferred S2 over the others; the amended modal system of "A Survey" was S3. But it is S4 and S5 that have generated sustained interest, mathematical as well as philosophical, down to the present day.
Lewis mildly preferred S2 over the others; the amended modal system of "A Survey" was S3. But it is S4 and S5 that have generated sustained interest, mathematical as well as philosophical, down to the present day.