" suppositional "

1: existing only as an assumption or speculation;

  * e.g., " ... concepts regarding the origin and structure of the universe must perforce be suppositional "

•  Synonyms : 

•  academic,

•  conjectural,

•  hypothetical,

•  speculative,

•  theoretical

•  Antonyms : 

•  actual,

•  factual,

•  real

1: an idea that is the starting point for making a case or conducting an investigation;

  * e.g., " ... my supposition is that this grape variety, which flourishes in southern France, should do equally well here, given the similar climate "

•  Synonyms : 

•  hypothesis,

•  proposition,

•  theory,

•  thesis

•  Antonyms : 

• (N/A)

2: an opinion or judgment based on little or no evidence;

  * e.g., " ... it's pure supposition on your part that there's something illegal going on next door "

•  Synonyms : 

•  conjecture,

•  guess,

•  shot,

•  surmise

•  Antonyms : 

• (N/A)

3: something taken as being true or factual and used as a starting point for a course of action or reasoning;

  * e.g., " ... worthless genetic research that was based on the erroneous supposition that acquired characteristics can be passed on to offspring "

•  Synonyms : 

•  assumption,

•  given,

•  hypothetical,

•  if,

•  postulate,

•  premise,

•  presumption,

•  presupposition

•  Antonyms : 

• (N/A)