Sentence examples for a valuable wellspring from inspiring English sources

Yet if the field of psychology has taught us anything over the last century, it is that common sense, although a valuable wellspring for hypothesis generation, is woefully ill suited for the systematic testing of hypotheses.

A) Valuable.

But a valuable one.

A valuable piece, ruined.

acetylchline & histamine, a valuable discovery.

They are a valuable  supplement.

This was a valuable contribution.

This is a valuable insight.

They perform a valuable role".

This is a valuable principle.

A valuable film, nonetheless.