A reinforcer is a stimulus that increases the probability that the behavior will occur again. An example of a reinforcer would be a dog treat. If you want your dog to follow the command "sit", you would follow the behavior with a dog treat, or reinforcer, to ensure that the behavior of "sit" would occur again.
That they couldn't represent anything and they wanted to destroy any icons
Marbury v. Madison was what established judicial review.
The answer is Seismoscope