Even if only one person were to experience it, it might still very well be real. Like those people who can see 'extra' colors that the rest of us are blind to. They're so rare, they could go their whole life without ever meeting another person who experiences their condition... but that condition would still be real.
More people experiencing something only adds to the likelihood that there is not a delusion in effect.
[ text | iPad ]
More people experiencing something only adds to the likelihood that there is not a delusion in effect.