Dr. Wilder claims to be the first person to recognize that the 'center of disturbance', center of a ridge pattern, is always where a volar pad exists. Wilder is also noted for the idea that ridges are ridge units fused together, a hypothesis which still remains unproven.
Tic-tac-toe is a game that is traditionally played by being drawn on paper, and it can be played on a computer or on a variety of media. History of Tic Tac Toe An early variation of the game was played in the Roman Empire, around the 1st century B.C.
Tit for tat (or tit-for-tat) is an English saying dating to 1556, from tip for tap, meaning blow for blow, i.e., retaliation in kindâor more broadly, an equivalent to an action given in return. It has related meanings and use as a concept in biology, social psychology, business, as well as in the mathematical area of game theory.