The phrase "an unambiguous source of" is correct and usable in written English.
It can be used when referring to a clear and definitive origin of information or evidence.
Example: "The research provided an unambiguous source of data that supported the hypothesis."
Alternatives: "a clear source of" or "a definitive source of".
He is part of a generation that shared longstanding assumptions about the way medicine is practiced: Physicians are the unambiguous source of medical knowledge; notes and orders are written in paper records while standing at the nurses' station; and X-rays are film placed on light boxes and viewed over a radiologist's shoulder.
To understand the nature and extent of genome mosaicism in E. gracilis, we searched for E. gracilis genes showing specific affinity to homologues of photosynthetic eukaryotes other than green algae, the latter being the unambiguous source of the endosymbiont that gave rise to the secondary plastid in euglenophytes.
Hopanes are the most unambiguous source marker of traffic emissions.
Whereas exact matches of the original canonical SMILES strings provides an unambiguous mapping of metabolites across data sources, the other types of matches are only approximate (they may or may not be correct) and so require further manual checking.
This sentence, in the context of the axiological sources of human rights, can be read as an unambiguous assigning of humans into the realm of beings not subject by their nature to any type of valuation.
Optimization techniques are used to enable an unambiguous quantification of the degree to which the sound power output of a distribution of point primary sources can be reduced by the addition of a number of point secondary sources.
Moreover, instead of conferring authority, the hierarchy establishes an unambiguous sequence of levels of accountability.
Note, that the coalescence of eigenmodes at the EP prohibits an unambiguous labelling of the modes.
