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a type of formal logic primarily developed in the 1960s that extends classical propositional and predicate logic to include operators expressing modality

2 votes
1 answer
103 views

introduction to modal logic

I am not entirely sure if we are allowed to ask such questions here but I was wondering if anyone could suggest me a real introductory level textbook on modal logic
BetaDecay's user avatar
  • 161
2 votes
2 answers
178 views

circularity of possibility defined over possible worlds

I have just checked similar questions that have been asked(and answered) before but I am still confused. How is it that the notion of possibility defined over as being True in some possible world not …
BetaDecay's user avatar
  • 161
3 votes
1 answer
733 views

The difference between indicative conditional and counterfactual

I was confused about the difference between indicative conditionals and counterfactuals. Could someone please offer an elaboration?
BetaDecay's user avatar
  • 161