Systems, methods, and other embodiments associated with search result ranking with certainty weighting are described. In one embodiment, a method includes receiving a search string being input to a search system to retrieve stored artifacts relevant to the search string. A first certainty level associated with a first portion of the search string is determined and a second certainty level associated with a second portion of the search string is determined. Artifacts retrieved by execution of the search string are ranked to produce a search result. The ranking is based, at least in part, on whether a retrieved artifact is relevant to the first portion or the second portion of the search string.