Anchor: 3. An economy that is not open to international trade and investment must rely solely on its own saving to provide the resources to invest in plant, equipment, and other forms of capital.
Entailed: An economy may just have to rely on its own saving.
Contradiction: An economy cannot just have to rely on its own saving.
Contradiction: A man is swimming the 1000 meter race.
Contradiction: A street musician playing his guitar.
Contradiction: This is still the residence of the rector of El-Ahzar.  
Contradiction: Yes, this is odd.