Iteration and verification is a part of this.<p>The core idea is plausible, if circular at present.  That&#x27;s OK.  Now, we take that and run with it to expand on what we think we understand and hopefully, confirm and even more hopefully, crack open some new physics.<p>Seems like Einstein nailed it.<p>But, questions remain.  Any of those could yield insights of similar potency and, ahem... gravity.