Assertion: morphine | /r/CapableOf | prove to be addictive
Facets:
value: so highly
type: DEGREE
Source sentences:
text: Morphine has proven to be so highly addictive, that in controlled studies that compared the physiological effects of injecting morphine and injecting heroin, there was no preference indicated; additionally, addiction studies conducted by the same research team demonstrated that tolerance developed at a similar rate with both heroin and morphine use.