Mary complains that her dog jumps up on her when she gets home from school. You explain that she reinforces this behavior by petting and talking to the dog when it jumps up, but Mary replies that you...

Mary complains that her dog jumps up on her when she gets home from school. You explain that she reinforces this behavior by petting and talking to the dog when it jumps up, but Mary replies that you must be wrong because she “hardly ever” does this. How would you respond to Mary’s comment?