Complex sentence: This question has not yet been definitively answered, but the consensus seems to be that they probably cannot be stable, which would lay to rest Wheeler's initial hope that a geon might serve as a classical model for stable elementary particles.
Split into simpler sentences: This question has not yet been definitively answered, but the consensus seems to be that they probably cannot be stable. This would lay to rest Wheeler's initial hope that a geon might serve as a classical model for stable elementary particles.