Check out websites and news outlets that you trust to see if and how they report on the same topic. Content that is intended to manipulate will often use extremes and exaggerations for which there is no evidence and will not be found in well-researched reporting.
Edrychwch ar y gwefannau a'r siopau newyddion rydych chi'n ymddiried ynddyn nhw i weld os a sut maen nhw'n adrodd ar yr un pwnc. Yn aml, bydd cynnwys sydd â'r bwriad i dwyllo'n defnyddio eithafion a gor-ddweud nad oes tystiolaeth iddo ac heb fod ar gael mewn adroddiadau sydd wedi'u hymchwilio'n dda.