Definitions
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- phrase   the 
doctrine that allknowledge issubjective , being derived fromobservations made byhumans , and there can be no objectivetruth  
Etymologies
from Wiktionary, Creative Commons Attribution/Share-Alike License
According to Plato, the phrase was coined by Greek philosopher Protagoras.
			
		
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