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AI · Theory

Semantics of Propositional Logic

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Theory

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Semantics of Propositional Logic

Semantics of Propositional Logic sits in symbolic / logic AI. Write what is true, then infer. Keep one tiny sentence on the board (P→Q, or Student(Asha)). Say whether you need probabilities or crisp true/false.

Output — idea / do / check for Semantics of Propositional Logic. Fill those three in the viva.

Trap for Semantics of Propositional Logic: writing English paragraphs and calling them a knowledge base. A KB is sentences a machine can query.

Exam tip

One formal sentence + what you can infer.

Example

# Semantics of Propositional Logic
print("idea :", "Semantics of Propositional Logic")
print("do   : one tiny example on paper")
print("check: one failure case")

Output: idea / do / check for Semantics of Propositional Logic. Fill those three in the viva.

Short notes

  • DefSemantics of Propositional Logic — symbolic knowledge / proof.
  • RuleSemantics of Propositional Logic — one tiny formal sentence.
  • TrapSemantics of Propositional Logic — English blob ≠ KB.

Questions

1

Explain Semantics of Propositional Logic as if you are teaching a junior — definition, then one example.

2

What does the example print, and what does that prove?

3

What mistake do freshers make with Semantics of Propositional Logic?

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