$$Not all sources are created equal. There are two types of sources: original or derivative. As a rule, original sources are considered more reliable than derivative sources, although exceptions do exist.
$$Original source: the original document or recording related to the event in question or a legible and legitimate image of that original document viewed via the Internet, CD-ROM, or microfilm/microfiche.
Exemple : $$An original will written by your ancestor’s own hand or signed by your ancestor.
$$Derivative source: a copy, compilation, or other derivation from an original source—may not retain the same value as the original because errors can be amplified over time.
Exemple : $$The court clerk’s transcribed copy of your ancestor’s will or a published abstract of the will.
$$The information provided by a source can be classified as either primary or secondary information. Primary information is typically more reliable than secondary information.
$$Primary information: information provided from first-hand knowledge of the recorder or the informant.
Exemple : $$A death certificate could provide primary information about the decedent’s death.
$$Secondary information: information that was not provided by someone with first-hand knowledge.
Exemple : $$A death certificate would usually provide secondary information about the decedent’s birth, unless the informant was a parent or someone else present at the birth.
$$We gather information from sources, and we use this information to compile evidence. Evidence can be classified as either direct or indirect.
$$Direct evidence: the information is relevant and directly answers the question.
Exemple $$A birth certificate provides a date of birth for your grandfather.
$$Indirect evidence: the information is relevant, but implies an answer to the question...
Exemple : $$A birth certificate...
$$We analyze the evidence to draw a conclusion. ...