This poses an interesting question. Philosophy has long grappled with the ineffable—those aspects of human experience and existence that seem beyond the reach of language. With brain-to-brain communication, the potential exists to bypass the inherent limitations of words and convey complex, subjective experiences directly. This development should at a minimum encourage philosophers to reconsider the boundaries of what can be expressed and understood (acquisition of knowledge) through traditional language.
The introduction of a direct mind-to-mind connection may challenge traditional epistemological frameworks. Questions about the nature of knowledge, belief, and understanding take on new dimensions when thoughts can be shared without linguistic mediation. Philosophers may need to reassess the criteria for valid knowledge and explore how this impacts our understanding of truth and justification
The direct transmission of thoughts could lead to profound existential and metaphysical questions. For example, the concept of solipsism (the idea that only one's mind is certain to exist) might take on renewed significance. Philosophers would explore the implications of this technology for our understanding of reality, existence, and the nature of the self.
I hope this accurately pinpoints some of the potential considerations that brain to brain communication may pose. Thanks for the fun idea!
--- Some bored philosophy student