Text: Radio-carbon dating on the lowest portions of the walls (sent tumbling by the horns of Joshua in 1200 b.c. ' Joshua 6:20) indicates that there was a settlement of some 3,000 people at this spot as long ago as 7800 b.c.
Entailment: Radio-carbon dating on the lowest parts of the walls indicates a settlement from 7800 b.c.
Contradiction: Radio-carbon dating shows that Joshua was alive one hundred thousand years ago.