In order to determine these, there are a number of possible sources of information (sometimes termed Primary, Secondary and Tertiary Sources) and methods of obtaining this information, which may be collectively referred to as Fact Finding. These sources may be described as follows:
Ili kuamua haya, kuna idadi ya vyanzo uwezekano wa habari (wakati mwingine wanaiita Msingi, Sekondari na Msingi Vyanzo) na mbinu ya kupata habari hii, ambayo inaweza kuwa pamoja inajulikana kama Ukweli Finding. Vyanzo hivi inaweza kuwa maelezo kama ifuatavyo: