Please grade the following essay on a 0-5 scale (5 being the highest):
In my opinion, specializing in one specific subject is better than having a broad knowledge of many academic subjects because of the nature of knowledge such as plentiness and complexity. Since the 17th century, many inventions were made. Information used to make these inventions and information provided by these inventions are accumulating such that noone alone can know all of these information. For example, in a typical university there are principal department such as natural science faculty, literature faculty, social science faculty etc.. All of these departments have also subdepartments. In my university, for instance, business administration, aconomics, international trade are subdepartments of social sciences faculty. A person can only attend only one of these subdepartments such that it is impossible to finish all of these departmens at the same time. So having a broad knowledge in many academic subjects are not that much possible. Another reason is the complexity of knowledge in any specific subject. When you want to cure an illness for example to cure the illness AIDS, you should specilize on viruses which are the cause of AIDS. Knowing many academic subjects such as optic, pschology, literature will not make any use to cure AIDS. Since you can only learn by doing it, specializing is better. Consequently, specializing is better than broad knowledge.
I would grade this essay as a 2 out of 5. Here are my key critiques:

1) The writing is quite repetitive and could be made more concise. Several sentences essentially reiterate the same point that knowledge is accumulating rapidly across many areas, making broad knowledge infeasible. This could be expressed more concisely.

2) The logic and flow of arguments is unclear. The first paragraph introduces the main point around the growth and complexity of knowledge, but the following paragraphs do not flow coherently from this. The second paragraph jumps abruptly to discussing university departments, and the third discusses the complexity of knowledge in a specific subject (AIDS) without tying it back to the overall theme. The concluding sentence is a bare restatement of the main point.

3) The grammar, spelling, and word choice have some issues, e.g. plentiness, aproch, each other, departmens. While relatively minor, these types of errors can make an essay harder to follow.

4) The examples used are fairly superficial. Discussing university departments and curing AIDS are interesting choices, but more in-depth, insightful examples would strengthen the key points.