But if he is truthful, why shouldn't we
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take his word for it that he sees red? But we do! That's to say we believe that he is not telling us a lie. – But if he is intelligent as well, why shouldn't ˇwe believe that what he has before
his
our
mind's eye is red. We do, – according to the method of comparison applicable in this case. ‘Then where do you disagree with us?’ – When you talk about something incommunicable, private.