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I would suggest if something is written somewhere else first and you wish to add onto it(whether or not written by your own hand) that you write in or use then a citation can be useful and perhaps necessary to avoid downvotes.

a citation can be placed into your post faily easy using the following symbol: > (and then content you are quoting from or using to further thoughts can be written afterward the *arrow > Symbol)

citations will come up looking like this on your posts which protect you from plagerizing by showing the public you are intending to show a source of your thoughts