1.   Before and after the four-hour signing, Ali demonstrated to Marcus employees that his affliction has not dampened his impish humor.

2.   But the work is filled with impish humor, wistful lyricism and sprightly folk tunes, qualities Ms. Uchida beautifully captured.

3.   By then, Moore had made it to New York, a city in which his impish humor and extravagant flights of fancy fit right in.

4.   Lewontin couches his arguments in impish humor and an erudite style, in articles for The New York Review of Books and lectures at colleges and universities.

5.   There was that same mystery to her then, with flashes of impish humor.

6.   This concerto is filled with impish humor, unexpected turns of phrase and rhythmic gymnastics that other pianists capture more vividly.

7.   His conversation, laced with impish humor, is a challenge for his visitors.