What is a vibratory or reciprocating motion. He has been arguing in a circle; there is thus a seesaw between the hypothesis and fact. Sir W. Hamilton called?

Question

Accepted Answer

seesaw — A vibratory or reciprocating motion. He has been arguing in a circle; there is thus a seesaw between the hypothesis and fact. Sir W. Hamilton. (Webster's 1913.)

What is a vibratory or reciprocating motion. He has been arguing in a circle; there is thus a seesaw between the hypothesis and fact. Sir W. Hamilton called?

Sources