Instructor Alex Evil Plot!

They were staring at him so intensely and in such a weird way that it made Vincent feel discomfort, and he couldn't help but gaze back at the instructors and say, "What's wrong? Is there something on my face??"

Mr. Holmes, who liked saying no the said honestly, replied, "No, no, no, nothing is wrong with your face. It's just that I was shocked to see the dozens of recently purified herbs that had 75% to 99% percent of their impurities removed, and their qualities increased by a good enough margin. Did you do it all in merely minutes?"

Instructor Alex, on the other hand, stormed ahead and stopped once he reached Vincent.

He pointed at the dozen or so ingredients on his table and asked, "Did you purify all of them?"