Expert Systems Rule-based Programming Quiz

The test CE is satisfied.

Performing predicate tests directly within patterns.

By using the | connective field constraints.

<p>The return value of a function.</p> Signup and view all the answers

<p>The function must have a single-field return value.</p> Signup and view all the answers

<p>The field is equal to ?size modulus 4.</p> Signup and view all the answers

<p>The purpose of updating the fact list to indicate that the electricity has been shut off is to ensure that the rule can be properly executed and the appropriate action (shutting off the electricity) is taken.</p> Signup and view all the answers

<p>The AND conditional element in CLIPS is provided so that it can be used with other conditional elements to make more complex patterns in the left-hand side of a rule.</p> Signup and view all the answers

<p>The NOT conditional element in CLIPS allows for the specification of the absence of a fact in the left-hand side of a rule, enabling the rule to be triggered when a particular fact is not present in the fact list.</p> Signup and view all the answers

<p>The purpose of the second rule pattern is to update the fact list to indicate that the electricity has been shut off, whereas the previous rule pattern simply printed a message about shutting off the electricity without actually updating the fact list.</p> Signup and view all the answers

<p>The EXISTS conditional element in CLIPS allows for the specification of the existence of one or more facts that match a particular pattern. It can be used in the left-hand side of a rule to check for the presence of certain facts before triggering the rule's action.</p> Signup and view all the answers

<p>The <code>not</code> conditional element is used to check if there is no emergency being handled. In the second rule, <code>(not (emergency))</code> is used to match when there is no emergency fact present.</p> Signup and view all the answers

<p>The <code>exists</code> conditional element is used to check if there is at least one <code>emergency</code> fact present, without regard to the total number of <code>emergency</code> facts. This allows a single partial match or activation for the rule to be generated based on the existence of one <code>emergency</code> fact.</p> Signup and view all the answers

<p>To modify the first rule to also print the type of the emergency, you can update the <code>=&amp;gt;</code> part of the rule as follows:<code>(defrule report-emergency (report-status) (emergency (type ?type)) =&amp;gt; (printout t &quot;Handling &quot; ?type &quot; emergency&quot; crlf))</code>This will print the type of the emergency in addition to the fact that an emergency is being handled.</p> Signup and view all the answers

<p>The <code>forall</code> conditional element allows you to pattern match based on a set of conditional elements (CEs) that are satisfied for every occurrence of another CE. It checks if for every fact matching the first CE, there are facts that match all of the other CEs.</p> Signup and view all the answers

<p>The <code>report-status</code> fact is used as a trigger to indicate that the monitoring status needs to be reported. Both the <code>report-emergency</code> and <code>no-emergency</code> rules have this fact as a pattern, which means they will only be activated when the <code>report-status</code> fact is present.</p> Signup and view all the answers

<p>To modify the rules to update a fact list with the reported emergency or no-emergency status, you can add an <code>assert</code> statement to each rule to update the fact list. For example:<code>(defrule report-emergency (report-status) (emergency (type ?type)) =&amp;gt; (printout t &quot;Handling &quot; ?type &quot; emergency&quot; crlf) (assert (emergency-reported (type ?type)))</code>(defrule no-emergency (report-status) (not (emergency)) =&gt; (printout t &quot;No emergency being handled&quot; crlf) (assert (no-emergency-reported)))```This will add a new fact to the fact list, either <code>(emergency-reported (type ?type))</code> or <code>(no-emergency-reported)</code>, depending on the situation.</p> Signup and view all the answers