It also has evidence in how speed-type characters/decks/armies/strategies are almost always superior to slower, more defensive ones.
Then I'm not too sure what you asked ^^' Sure, all three sides could be used outside of battle, but your original question asked if defensive moves can be used as offensive moves and cause damage, to which both Kingofheart and I said yes and why. Then you started saying that offensive is better, defensive can't deal damage, and that castles are great defensive but not offensive, which isn't necessarily true. While the castle alone is defensive, the people within are offensive. A castle, given the right time period, was considered almost impossible to penetrate, especially during a siege. The castle would have archers all along the walls and roof, it also has people dumping tar on the sieging army, those exiting the castles to fight, those fighting inside the courtyard if some manage to get inside, etc. Sieges almost never succeeded, and when they did, the casualties would be large and almost not worth it. And the last statement of slower and defensive can't last against speed is wrong too. Think of the Gladiators (or Spartans, not sure which). They had the numbers, and the defense. When charging, their front lines moved slowly, shields next to each other, creating an almost impenetrable line. Once close enough to their opposing army, who were running in full charge, they would use the shields as weapons, thrusting the heavy wood and metal into the person charging, thinking the could get through. One or two strong hits will kill that person. Those that managed to get behind the front line would be met with arrows from the back line. Those who survived would be fought with the mid line, swords and other melee weapons in hand, possibly on the backs of horses. We've taken this technique for riots. Police officers use riot shields as they line up in preparation for a riot. Then they'd move slowly towards the rioters, and slowly surround them. The don't hit the people as hard as the Gladiators (or Spartans) but they still use the shields in a similar manner. Those who made it past would be squirted with fire hoses. And those that past the fire hoses were wrestled to the ground and arrested. So going back to my original statement, I'm lost. We answered your question but it seems you already had an answer.... in this post, I tried to explain how defensive can be offensive, which was your original question, but it's up to you to decide which you prefer.