[There's a short silence as Neku contemplates arguing the point. He doesn't want to think of his partner or the digimon he's met here as 'souless'. But it'd be an argument based off gut reaction and emotion. And he has a feeling Alex would tear into that harshly.]

Well, I will agree it looks and feels like they're fueled by something we have that they don't. I mean, the digimon DO evolve naturally eventually, but not in these huge burst like our partners do.