Does disagreement imply contradiction?

Align proposition, scope, polarity, and valid time before labeling two claims. Source authority affects resolution policy, not logical compatibility.

Claim A

Lia avoids caffeine

Polarity: positive
Context: night
Valid time: [40, ∞)
Source: Lia message, authority 0.95

Claim B

Lia does not avoid caffeine

Context: night
Valid time: [92, ∞)
Source: clinician note, authority 0.85

Alignment test