Text: But, if he had bothered to read any history books, he'd have discovered that a new set of entrepreneurs was born out of the massive Boeing layoffs of 1970, when tens of thousands of unemployed Boeing workers were trying their hands at anything to make a buck.
Entailment: He would have discovered that a new set of enterpreneurs was born out of the massive Boeing layoffs of 1970, if he only bothered to read any history books.
Contradiction: But, if he wouln't bother reading history books, he wouldn't have discovered that.