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u perspek - Filozofski fakultet u Splitu

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· 0=hW, W × W i<br />

[Fiat(p)] 0 = hW, {(w, v) | p ∈ w ∧ p/∈ v}i = σ 1<br />

[Est¤ (p → q)] σ 1 =<br />

=<br />

* {w | p/∈ w ∨ q ∈ w} ,<br />

=<br />

⎧ ¯<br />

⎫<br />

¯<br />

+<br />

⎪⎨ ¯ (p /∈ w ∨ q ∈ w) ∧ ⎪⎬<br />

¯<br />

hw, vi ¯ (p /∈ v ∨ q ∈ v) ∧ =<br />

¯<br />

⎪⎩ ¯ p ∈ w∧<br />

⎪⎭<br />

¯ p/∈ v<br />

¿ À<br />

{w | p/∈ w ∨ q ∈ w} ,<br />

=<br />

{hw, vi |p ∈ w ∧ q ∈ w ∧ p/∈ v}<br />

= σ 2<br />

· Test konkluzije:<br />

– σ 2 ∈M<br />

– Fiat(q) je prihvatljivo:<br />

[Fiat(q)] σ 2 =<br />

=<br />

¿<br />

{w | p/∈ w ∨ q ∈ w} ,<br />

{(w, v) | p ∈ w ∧ q ∈ w ∧ p/∈ v ∧ q/∈ v}<br />

= σ 0<br />

i σ0 /∈F.<br />

· – Fiat(¬q) nije prihvatljivo:<br />

268<br />

À<br />

=

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