After what seemed initially an unproductive session (P177), Peggy discovered the word TURN. Looking through the RED lettered cards (probably for some other word) she selected and keyed it. The TRUCK (or VAN) which was the current objects reversed as directed and Peggy exclaimed, “It turned !”

This does not argue that at that moment she learned the word and semantics of TURN — but it does exemplify how such learning is gradually achievable by a sequence of small discoveries in a rich milieu.