Owen J. Roberts, St. Paul Mercury Indemnity Company v…
“ In a cause instituted in the federal court the plaintiff chooses his forum. He knows or should know whether his claim is within the statutory requirement as to amount. His good faith in choosing the federal forum is open to challenge not only by resort to the face of his complaint, but by the facts disclosed at trial, and if from either source it is clear that his claim never could have amounted to the sum necessary to give jurisdiction there is no injustice in dismissing the suit. ”
