ISBN-13: 9781138732094 / Angielski / Miękka / 2018 / 194 str.
ISBN-13: 9781138732094 / Angielski / Miękka / 2018 / 194 str.
In this book, first published in 1968, the author shows that there are a number of different kinds of non-logical possibility, subtly interrelated, each requiring separate explanation.