Assertion: controlled experiment | /r/HasProperty | difficult
Facets:
value: prohibitively
type: DEGREE
Source sentences:
text: The term "experiment" usually implies a controlled experiment, but sometimes controlled experiments are prohibitively difficult or impossible.
text: An example of an area where controlled experiments are difficult is human testing.
text: The term "experiment" usually implies a controlled experiment, but sometimes controlled experiments are prohibitively difficult or impossible.