In this paper we investigate how to extend a generic constraint solver that provides not only tell constraints (by adding the constraint to the store) but also ask tests (by checking whether the constraint is entailed by the store), with general ask constraints. Ask constraints are important for implementing constraint implication, extensible solvers using dynamic scheduling and reification. Wh...

Mrs. Chaloner approves the modern manner of answering difficult questions simply and honestly, but warns against perplexing children by giving them more facts than they want, or can use at a particular stage of understanding. Throughout the book she gives examples of the differences in interest and meaning which the same question may have to the two, three, four, and five year old child. The na...