An ancient dilemmaAn ancient dilemma
“Once there was a man of Ch`u selling shields and halberds. In praising his shields he said, ‘My shields are so solid that nothing can penetrate them.’ Again, in praising his halberds, he said, ‘My halberds are so sharp that they can penetrate anything.’ In response to his words somebody asked, ‘How about using your halberds to pierce through your shields?’ To this the man could not give any reply.” – The Complete Works of Han Fei Tzu (trans. and ed. W. K. Liao)