presumption noun 
Something that you {think is true} {because it is} "very likely" 
"Extremely likely" = {extremadamente{spanish} probable  
"very likely" = muy probable 
very likely adj	  
{highly probable} 
muy probable adj 
{I think} its very likely that we will get some rain tonight. 
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Where is the truth in "Very Likely", its a probability, {p+50% fact/{n-50% fact.
how can {p+50% fact/{n-50% fact be truth, it cannot.  Truth is 100%, backed up with facts, so "Very Likely" can only be a {probable, fact} outcome.
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probably:
prob·a·bly  
/ˈpräbəblē/ 
Adverb 
Almost certainly; as far as one knows or can tell. 
Synonyms 
presumably - likely - belike - perhaps - maybe - possibly