"
Also, how about this change. Instead of:
""In this framework, questions regarding the existence of these kinds of entities are called internal questions.""

could we use:
""Questions that can be answered within a 'framework' are called internal questions.""

The restriction of 'internal' questions to 'existence questions posed within a framework' is misleading in that all questions posed within a framework are 'internal', not just existence questions.   "