ITPEC FE Subject A October 2024 Question 1
ITPEC FE Subject A October 2024 — Question 1 of 60
Propositional Logic — determine truth values from given conditions.
Given: P = True, (not P) or Q = True, (not Q) or R = True.
- •
not P = False→False or Q = True→Q = True - •
not Q = False→False or R = True→R = True
Result: Q = True, R = True → (d)
Why not others:
- (a) Q=False, R=False — False or False = False, violates first condition
- (b) Q=False, R=True — False or False = False, violates first condition
- (c) Q=True, R=False — False or False = False, violates second condition
Key rule: When X or Y = True and X = False, then Y must be True.
AI-generated — may contain errors
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