April 1999
CO230: COGNITIVE SCIENCE

QUESTION 1 (Compulsory)

Total Marks: 20 Marks

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SAMPLE STUDENT'S SOLUTIONS
for Question 1

 
(a) In the information processing approach, knowledge can be defined as declarative or procedural. Briefly describe these terms and give an example of each.

 

 [4]
(b) Using the following predicates:
  • birds(X)
  • animals(X)
  • has_feathers(X)
  • can_fly(X)

express the following statements as quantified predicate expressions:
(i) All birds are animals. [1]
(ii) If an animal has feathers then it is a bird. [1]
(iii) Some birds can fly and all birds have feathers.

 

 [2]
(c) In fuzzy logic, single inference makes use of a single inference rule to find output for given input values. Give an example of a fuzzy rule (briefly explaining why it is fuzzy). Describe the three steps used in a single inference.

 

 [4]
(d) Briefly describe how an artificial neuron works in terms of the inputs, weights activation function, and output.

 

 [4]
(e) (i) What does the imitation game designed by Alan Turing test? [2]
(ii) What are the flaws in the rationale of this test? [2]