Activity for 8500 Ward
| Type | On... | Excerpt | Status | Date |
|---|---|---|---|---|
| Edit | Post #290637 | Initial revision | — | 9 months ago |
| Question | — |
Are these introductory logic textbooks wrong to teach ‘unless’ = ‘or’? Colin Fine answered that >Unless" does not equal "or" 'directly and intuitively'. This contradicts the textbooks beneath. Who is correct? >Usually, "P unless Q" is "symbolized as P ∨ Q. Stephen Cole Kleene, Mathematical logic (1967 - Dover ed 2002), page 64.  |
— | 9 months ago |