Lecture 6 Backward Chaining. Java combined with Jess (continued)

[FH] 7.7  Searching Working Memory With defquery   	pg 128 (161) [J1]
[GR] 12.4 Backward Chaining 				pg 526 (536) 
[FH] 7.4  Backward Chaining Rules (in Jess)     	pg 116 (149)

[J1] http://www.jessrules.com/jess/docs/71/queries.html