Proof READ your document . The spell checker will not pick up missing lines and seriously deficient logic. Have someone else read your paper . The flawed logic has been part of your creation process, and you are unlikely to catch it. Let another person help you find the glitches.
Data are plural, datum is singular.
Check on the antecedents to your pronouns. If the antecedent is not the last named group or item, you need to restructure your sentence. Unless you are certain you know how to use these, avoid them by breaking the sentence into smaller, direct and active sentences. Do not confuse affect and effect. Either find a way to include the comment directly in the text or omit the information.