LING 3505 Lecture 15: LING 3505 – March 7
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It is necessarily the case that jenna left. = it is not possible that jenna didn"t leave. = it is not necessarily the case that jenna didn"t leave. Jenna must have left = (jenna left) It is necessarily the case that jenna left in pw. Jenna may have left = (jenna left) It is possibly the case that jenna left in w w2 jl w3 jl. ~bl = t w2 ~bl w3 ~bl. Tl = t w2 tl w3 ~tl. Exercises, pg 92: a) necessarily, a bachelor is unmarried. (a bachelor is unmarried) w ( a bachelor is unmarried is true in w: a child could have invented the mousetrap. (a child could have invented the mousetrap) w ( a child invented the mousetrap is true in w) Epistemic (a child could have invented the mousetrap) we ( a child could have invented the mousetrap is true we: if wishes were horses, beggars would ride.