| − | First, what are "non-materialistic phenomena"? Second, black holes most certainly exist. Cygnus X-1 and Sagittarius A* are examples. | + | First, what are "non-materialistic phenomena"? Second, black holes most certainly exist. Cygnus X-1 and Sagittarius A* are examples. [[User:QuantumDude|QuantumDude]] ([[User talk:QuantumDude|talk]]) 00:16, 8 February 2016 (EST) |