2. Look for straight apostrophes in a document that otherwise has "smart" apostrophes. This can be a sign of pasted text. (Credit: Karen Wise)

3. Look for spaces that become nonbreaking (shown by a little degree symbol instead of a dot). Another sign of pasted text. (Credit: Karen Wise)

When they see these flags, they start pasting text into Google to see if it's on some website.

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