Assertion: hypothesis | /r/HasProperty | difficult to test
Facets:
value: much more
type: DEGREE
Source sentences:
text: This type of research method might be used to investigate a hypothesis that is difficult to test experimentally.
text: However, hypotheses about what happened a long time ago, at the point of the Big Bang for example, are much more difficult to test directly (which some people take to mean it can't be tested at all).