وَمَنِ اجْتَازَ بِعَرَفَةَ وَهُوَ نَائِمٌ أَوْ مُغْمًى عَلَيْهِ أَوْ لَمْ يَعْلَمْ أَنَّهَا عَرَفَةُ أَجْزَأَهُ ذَلِكَ عَنِ الْوُقُوفِ
Translation: Whoever passes through Arafat while asleep, unconscious, or unaware that the place is Arafat, this suffices for the standing.
The rule concerns actual presence inside Arafat during the valid time, not imagining oneself there or merely intending to be there from a different location.