" If the answer is "no," then that evidence should probably be excluded.
When you are evaluating evidence, be critical and thorough.
While it might be tempting to go off on a tangent about some interesting side note to your topic, doing so can make your writing less concise.
Always question any evidence you include in your essay; ask yourself, "Does this directly support my thesis?
Grammar, style, and punctuation are incredibly important if you want your research to be understood and taken seriously.
Before writing an essay, make sure you have a solid understanding of basic grammar.
However, the one thing that would define it is its revolution around a particular theme.
Just in case you are wondering: Essay: An essay is a piece of writing (usually a few thousand words) that delivers the authors own, more or less witty, perspective on a scientific, cultural or social phenomenon.
Be mindful of your comma usage and know when a period is needed.
Finally, in academic essay writing, voice is important. Avoid transition words that don't add anything to the sentence and unnecessary wordiness that detracts from your argument.