The Fight

This week Red Writing Hood calls for us to write a fight. I happen to have a fight written from a scene of a longer work that I've been fiddling with for quite some time now. 

Background:

All the world (aka the stage): 
What can I say? There's magic folks - I'm calling it erg for the sake of this post. If it's not your cup of tea, don't worry - it's the setting, not the point. The three characters are sitting around a campfire after a long day of travel.

Men and women (aka merely players): Three traveling companions
Alden - an older gentleman who looks to be about 60 and displays magical abilities
Niko - a seventeen year old boy who's just getting out into the world for the first time; has no magical abilities and is very scientifically minded
Taran - Niko's former teacher and also a magic user
Tully - another travel companion


The fight:

“The only way it really could have happened was for the powder to have been poisonous to that species…” Niko finished, impressed with his logical conclusion.

“And how do you explain Taran being able to draw with erg then?” Alden asked, getting to wits end. He had heard about every scientific explanation he cared to hear and then some.

“I’m still not sure that’s what it was exactly. See, Taran doesn’t seem to be entirely human and it could be that something secretes from her skin had a reaction with that kind of  mineral –“

“Are you serious?” Alden asked, standing in his anger. Taran, too, stood glaring at the boy and with a shake of her head, stalked off. Tully gave an assessing look to the old man and the boy before heading down the path Taran had taken.

“What?” Niko asked confusedly, “What did I say?”

Alden, whose face was cradled in his palms, looked up again with rage in his eyes. “You are a naïve child. Do you not understand why she might take offense? When you begin to doubt her humanity?”

“I didn’t mean -,” Niko started, but Alden broke in again.

“What? You didn’t mean to call her an animal?”

“I didn’t… I just… and don’t your people revere animals?” Niko defended, not wanting to let go of his idea.

“We revere and respect their place and our connection with them. But just as an insect should never be mistaken for a bird, a human being should never be mistaken for something he or she is not How dare you strip her of the last thing she feels in common with those around her. Just because you cannot explain it with your contraptions and theories, doesn’t make it not real. There are things beyond explanation.” He sat down again with a forceful exhalation.

Niko, who had started to cower under the weight of Alden’s words, snapped back to attention. “I don’t think that’s true. Everything has an explanation.”

Alden roared furiously into the night. “So what it it’s true? Does knowing the explanation change something for you? Does it make you its master?”

Niko couldn’t find anything to say.

“Just because you can’t explain it,” Alden said, “Doesn’t mean it’s not real or substantial. You can’t explain away how Taran saved your life today. That doesn’t make it unimportant that she did so.”

Niko shifted uncomfortably on his log, staring into the fire to avoid Alden’s eyes. The old man shook his head again and sighed as he went to his tent for the night.

Questions from the author: Does the dialogue seem realistic? Do you get the impression that Niko is a young man trying to prove himself? Do you feel the age difference and experience difference between the two (without any serious background info)? Do the characters reactions seem realistic?
**Please note that this is all first draft material**