lispdoc - results for yes-or-no-p

(yes-or-no-p &optional format-string &rest arguments)
Function: YES-OR-NO-P is similar to Y-OR-N-P, except that it clears the input buffer, beeps, and uses READ-LINE to get the strings YES or NO.
 Mentioned in:
CLtL2 - 21.1. Standard Streams
CLtL2 - 22.4. Querying the User
HyperSpec - Function Y-OR-N-P, YES-OR-NO-P