Two negative premises prevent any logical determination of class relations

Evidence

If both premises are negative, we cannot determine anything regarding their relation to one another. — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 901

Categorization

• corroborated: 2 independent passages support this claim — Ruggero J. Aldisert, Agatha D. Aldisert, Logic for Lawyers- A Guide to Clear…, 901