channels 's nevertheless profound um uh example presence know uh vr virtual reality research varies independent similar various similitude right realistic virtual world people n't feel 's real n't get sense presence uh 's important perspectival uh course get kinds weird derealizations uh know pathological participatory lost um uh know people think loved ones actually replaced robots um even though everything nothing else changed factually 's sense fittedness gets damaged brain 'll leave 's symptoms syndromes arm right like n't arm right looks exactly like arm move 's arm 's um course less pathological although necessarily less dangerous versions loneliness right culture shock um 's see sense realness disappearing participatory level perspectival level procedural level course know feel inept um think something like although conflated even like social awkwardness get right fee feel disempowered futile one ways making people feel existence becoming unreal 're procedurally inept actions futile course level know conviction coherence know right things n't hang together well people also undermining sense realness cognitive dissonances fascinating evidence sorry long thing 'm trying say right think agreement sacredness realness multi-dimensionality realness something 'm trying unpack terms