Assertion: matter's mass | /r/HasProperty | well-defined
Facets:
value: in physics
type: OTHER
value: scientifically
type: DEGREE
Source sentences:
text: Scientifically, the term "mass" is well-defined, but "matter" can be defined in several ways.
text: Matter is a word that is sometimes used in varying ways in everyday life, whereas mass is a well-defined concept and quantity at least in physics.