Original: Problems with Q A principal objection to the 2SH is that it requires a hypothetical document , Q , the existence of which is not attested in any way , either by existing fragments ( and a great many fragments of early Christian documents do exist ) or by early Church tradition .
Simplified: The two source hypothesis requires a second source , called Q . The problem is that this source is not mentioned in the many fragments of early Christian texts that were found , or in the early Christian Church tradition .