(A neolithic event.) He makes a step forward dressed in a skin, and offers some stone axes for trade: "What about those?" Teddy asks: "Are those better for cracking that beans?"

Pi is composed of 彳 a step with the left foot as radical, and 皮 p'i skin as phonetic. It means that, objective, as opposed to 此 tz'ǔ this, subjective.