My series on early Mike Nichols films concludes this month with what I consider to be his greatest achievement — a 1971 adaptation of Jules Pfeiffer’s brilliant screenplay, “Carnal Knowledge.” Starring the most vibrant screen actor of the day, young Jack Nicholson, “Carnal Knowledge” follows the sexual lives of two men (the other played by singer and Nichols friend Art Garfunkel) from college through middle-age.