Text: 2For a description of prototyping and the spiral model, see Roger S. Pressman, Software  A Practitioner's Approach, 3rd ed.
Entailment: For a description of prototyping and the spiral model, see Roger S. Pressman, Software A Practitioner's Approach, 3rd ed.
Contradiction: There is not a book named Roger S. Pressman, Software A Practitioner's Approach, 3rd ed..