Although it might seem that there are few terms more free from ambiguity than the term equal, yet scientific men do employ it with at least four meanings, which it is desirable to distinguish. These meanings I may describe as (1) Absolute Equality. (2) Sub-equality. (3) Apparent Equality. (4) Probable Equality.


The Principles of Science: A Treatise on Logic and Scientific Method, Chapter XXI (p. 479), Macmillan & Co Ltd. 1887

William Stanley Jevons Quotes

Although it might seem that there are few terms more free from ambiguity than the term equal, yet scientific men do employ it with at least four...

Although it might seem that there are few terms more free from ambiguity than the term equal, yet scientific men do employ it with at least four...

Although it might seem that there are few terms more free from ambiguity than the term equal, yet scientific men do employ it with at least four...

Although it might seem that there are few terms more free from ambiguity than the term equal, yet scientific men do employ it with at least four...