When would the horse named Clever Hans provide the correct answer to a question?
A) When his trainer was present
B) When he was provided with food prior to answering a question
C) When the questioner was visible to him
D) When his trainer asked the question
Question 2
When would the horse named Clever Hans NOT provide the correct answer to a question?
A) When it was asked by anyone other than his trainer
B) When the questioner did not know the answer
C) When people were watching
D) When Hans did not know the answer