win(header(pc,furule_model_factory,'Certainty factors example',nil),7,25,609,556,conts(`~M~J/* This light-hearted Easy-f model illustrates the use of certainty factors (CFs). ~M~JAs explained in the User's Guide, CFs are integers in the range -100..+100~M~J representing the degree of certainty (definite false..definite true) associated ~M~Jwith a fact or rule. At runtime, InterModeller will combine the CFs in the model ~M~Jwith the CFs  supplied by the user in reply to questions. ~M~JAdvice will be offered with a resultant CF.~M~J~M~JNote: CFs are IGNORED unless the File menu Preferences command ~M~Jshows 'Certainty handling' set to ON. The default is OFF.~M~J~M~JTom Conlon July 2000 */~M~J~M~J~M~JIF the postman says it will rain~M~JTHEN it will rain today ~M~JCF 30.                                          % My postman's often wrong~M~J~M~JIF you have just put your washing out to dry~M~JTHEN it will rain today ~M~JCF 35.                                          % Sod's Law~M~J~M~JIF it rained yesterday~M~JAND it was dry the day before yesterday~M~JTHEN it will rain today~M~JCF 50.                                          % Hmmm, mixed evidence~M~J~M~JIF it rained yesterday~M~JAND it rained the day before yesterday~M~JTHEN it will rain today~M~JCF 60.                                          % Looks more like a genuine trend~M~J~M~JIF Michael Fish says it will rain~M~JTHEN it will rain today~M~JCF 90.                                          % Trust the professionals!~M~J ~M~J`,'System',2,16)).
