> Critical thinking is good; shallow cynicism, on the other hand, adds nothing of value to the community. That's a comparison of apples and oranges. Critical t

> Critical thinking is good; shallow cynicism, on the other hand, adds nothing of value to the community. That's a comparison of apples and oranges. Critical thinking is something you do, i.e. an action. Cynicism is an attribute of a person. This essentially tells that a cynic, i.e. the person as a whole, should not contribute in the case he/she is shallow. Whatever 'shallow' means in the context of a point of view developed from years of experience. So even if such a 'shallow cynic' is critically thinking he/she is excluded as per that statement. I'd rephrase that statement using a word like sarcasm (that is actually an action and not a statement about a person) since the guidelines should not criticize persons but their actions, which is – by the way – the right way to phrase negative feedback.