Sleep is a very important part of an individual's daily life. This is the time when our brain resets and rejuvenates. It is also a widely studied topic by numerous researchers and is seen as an important metric in determining success at the workplace and otherwise. Sleep, however, can be a make-or-break habit, dependent on the number of hours one spends unconscious. The argument that the author presents here however is rife with assumptions and ambiguous analysis that can render the deductions baseless.

Firstly, the argument assumes that the 300 employees are indeed reporting their sleep hours correctly. The author does not indicate the validity of this data. This data could be more reliable if it were taken from sensors but reported data is often based around the ideal values of six to eight hours of sleep. Hence, survey data is hugely unreliable here because it is not based on evidence.

Additionally, the survey links the amount of sleep to the success of the firm. The latter is a vague feature with no information on how this variable was measured. The underlying assumption is that the revenue generated by these firms is the measure of success. However, this too can be flawed as the author does not mention what is the contribution of these 'six-hour sleep' individuals to the reported revenue. A more accurate association could be 'hours of sleep reported' to ' revenue generated'.

Finally, the author here reports only one feature with a correlation and finally concurs that if a business must prosper, it has to hire individuals who report six hours of sleep. This is merely a correlation at best and cannot be treated as causation, which the author does. Other factors and habits could be responsible for the success of an employee in a firm, thereby, affecting the firm's success, which in itself can be a result of various other factors other than recruiting great employees.

Arianna Huffington, recently, has been seen to be standing (perhaps say stood up or has been standing up) up against glorifying the lack of sleep and the burnout that it results to (you would say results in, but it is a bad idea to end your sentence in a preposition usually). To sum up, there are many other studies (you are bringing up a topic of "other studies" which is great but you should have mentioned it in the other paragraph, not the conclusion. Never bring new evidence in the conclusion. it makes the rest of your essay incomplete) that prove sleep is essential to determining success and a full night sleep has been more beneficial than a lack of it. The author's argument is based on an incorrect analysis of a study and contains various logical holes that disprove his theory.