Consider the following Java method:

/** Returns true if c is a lower case letter */ public static boolean charIsLowerCaseLetter(char c) { return 'a' <= c && c <= 'z'; } 

Without using the ! operator, how could you implement the following?

/** Returns true if c is not a lower case letter */ public static boolean charIsNotLowerCaseLetter(char c) { return ___________________; }