By the time Eric and his groupies finished bickering with each other, Vincent reached the substitute teacher, who was here to oversee their process.
"Mr. Holmes, I have finished purifying the ingredients," Vincent spoke to him formally as the latter was his teacher. Even though Mr. Holmes was only a robot, a being artificially created by the esoteric engineers of the federation, Vincent believed that he still deserved to be treated with the respect a student would give to their teacher; he and the other should not treat him like a mere thing because even though he was made of metal and lived off of energy, he was the one teaching them stuff.
"Finished?"
"So soon?"
"Am I hearing it right?!"
"Is the purifying process as easy as taking a stroll around the park, heh?! He is spewing bull shit!"