Does the hypothesis 'Long ago--or away, or whatever--there was a world called Thar?? and another called Erath.' logically conflict with the premise 'Thar and Erath were not the only worlds in existence then.'
Long ago--or away, or whatever--there was a world called Thar?? and another called Erath.###Thar and Erath were not the only worlds in existence then.