Sailing-ships with heavy batteries had never been beaten by galleys.

Evidence

Galleys were not meant to fight against sailing-ships armed with heavy batteries and had never beaten them, even by boarding, except when in overwhelming force. Galleys were too low in the water, too fragile, too vulnerable to gunfire, and carried too few guns. — Garrett Mattingly, The Defeat of the Spanish Armada, 221

Categorization

• corroborated: 2 independent passages support this claim — Garrett Mattingly, The Defeat of the Spanish Armada, 221