Text: However, technology boosters, who won't stop thinking about tomorrow, often forget to think about  It's not at all clear that increasing returns are any more important in software than they were in the early days of railroads, electricity, telephones, radio, even automobiles (What good is a car without gas stations?
Entailment: Technology boosters never stop thinking about tomorrow. Technology in the early days included railroads, electricity, telephones, radio, and automobiles.
Contradiction: No one uses railroads anymore.