"Yeah, you can." There's no doubt in Dirk's voice. No encouragement, either. Just simple fact delivery.

He's not disparaging of Ranboo's defeatism, despite his certainty that's what it is. The mind is a huge part of what moves the body. Dirk knows this. As a man whose body is his mind's worst enemy, he knows this. More than that, though: he's a man who was raised on being spurred to move despite his mind and body's joint conviction he couldn't. Pain, exhaustion, fear, damage. All of it capable of stopping him, of bringing him down and keeping him down. But it wasn't. The well from which that strength is drawn always looks and feels empty, until you learn to stop looking, and to stop feeling. You learn to jump down the well yourself, sight unseen. You learn to go without drawing from it at all.

You learn that you're not going to die, no matter how much you feel like it. You're not dead until you're actually dead, and sometimes not even then.

So when Ranboo says I can't, and Dirk replies Yes, you can, he's being cruel. He's also being kind. He's teaching. Ranboo is learning. They'll learn. They'll get up.