Final answer:
Chimpanzees have abstract thought and can solve puzzles, as shown by the research of Wolfgang Köhler. They can visualize the result of an action before performing it.
Step-by-step explanation:
Chimpanzees have been shown to possess abstract thought and the ability to solve puzzles. An example of this is the research conducted by Wolfgang Köhler, where chimps were able to stack boxes to reach a banana that was placed out of their reach. This demonstrates their ability to visualize the result of an action before performing it. Their cognitive learning abilities are more powerful and versatile than simple conditioning.