#1. In the text we briefly discussed the problems of understanding natural languages as opposed to formal programming languages. As an example of the complexities involved in the case of natural languages, identify situations in which the question "Do you know what time it is?" has different meanings.

#2. Give some examples of declarative knowledge. Give some examples of procedural knowledge.

#3. In the context of a production system, what is the difference between a state graph and a search tree?

#4. Adjust the weights and threshold values in the artificial neuron network in Figure 11.18, so that its output is 1 when both inputs are the same (both 0 or both 1) and 0 when the inputs are different (one being 0 while the other is 1)

#5. Describe how the problem of traveling from one city to another could be framed as a production system. What are the states? What are the productions?