Martha is playing a simple card game with her toddler son. the cards are similar to the playing cards used by adults, but the suits are similar shapes—square, circle, triangle, diamond. martha's son has little trouble sorting the cards by either number or shape, except when the sorting rule changes. he has trouble switching from sorting by color to sorting by shape, and vice versa. martha's son is demonstrating:

Voters commonly condemn politicians for being insincere, but politicians often must disguise their true feelings when they make public statements. if they expressed their honest views—about, say, their party's policies—then achieving politically necessary compromises would be much more difficult. clearly, the very insincerity that people decry shows that our government is functioning well. which of the following, if true, most seriously undermines this reasoning? (a) achieving political compromises is not all that is necessary for the proper functioning of a government. (b) some political compromises are not in the best long-term interest of the government. (c) voters often judge politicians by criteria other than the sincerity with which they express their views. (d) a political party's policies could turn out to be detrimental to the functioning of a government. (e) some of the public statements made by politicians about their party's policies could in fact be sincere.