On the other hand, at any given moment there is at least one such pair of contact points; usually more than one, even a whole line or surface of contact.
oN the OtHer Hand, aT ANy GivEN mOmenT THeRe iS at leAst oNe sucH pair Of cONtacT PoiNts; uSUaLly MORe Than one, even a WHole lINe Or sUrfaCe oF conTAct.