Definitions:

1. derived from observed facts adverb
   • The theory of evolution is a wellknown a posteriori argument.
2. In a way that is based on known facts or on what has been seen to happen. ADJECTIVE
   • This argument is an a posteriori argument.
3. involving reasoning from facts or particulars to general principles or from effects to causes adjective
   • A posteriori knowledge can be gained by conducting experiments and gathering data in scientific research.
4. requiring evidence for validation or support adjective

Synonyms:

• Analytical
• Empirical
• Experimental
• Inducible
• Reasonable