The document is an assignment for a medical diagnostic expert system for diagnosing various conditions including HIV, pregnancy, and flu based on specific symptoms. It requires the system to recognize synonyms for symptoms and respond accurately even with varied inputs. Additionally, it prompts students to consider system limitations to avoid incorrect outputs, such as diagnosing a male as pregnant.

1.
Damascus University
Faculty of Information Technology Engineering
Artificial Intelligence Department
Knowledge Based Systems
​Knowledge-Based Systems Homework
02​th​
May 2018
The assignment is to write a medical diagnostic expert system that is
capable of diagnosing one of the following medical situations:
HIV:
● sore throat
● headache
● fever
● rash
Pregnancy:
● fatigue
● vomiting
● lightheadedness
● increased waistline
Flu:
● headache
● fever
● tiredness
● nasal discharge
Your system should function correctly even if the user inputs a synonym of
one of the symptoms. Here is a list of the synonyms that your system should
recognize:

2.
● fever​:​ elevated temperature, hyperthermia, pyrexia.
● headache​:​ pain head, migraine.
● sore throat​:​ pain throat, throat sore.
● fatigue​:​ exhaustion, lethargy, tiredness, weariness.
● vomiting​:​ emesis, stomach upset, upset stomach, nausea.
● passed out​:​ fainting, lightheadedness, syncope, vasovagal.
A typical example​:
The input
Khaled has:
● migraine
● pyrexia
● fatigue
● nasal discharge
The output
● Khaled ​has/is​ ​flu.
After you are done with implementing the above expert system, try the
following:
The input
Khaled has:
● headache
● vomiting
● lightheadedness
● increased waistline

3.
Your system will respond by saying: "​Khaled​ has/is pregnant." Even if ​Khaled
has all these symptoms, obviously he cannot be pregnant. What do you
need to add to your expert system to avoid this problem?
Eng. Ahmad Hussein
ahmadhussein.ah7@gmail.com