MacDonald tells us, "there are procedures for determining whether any waking perception is veridical or illusory. One perception is checked or corrected by others." These procedures are constantly and deliberately employed when a perception is doubted. If I want to determine whether a rock is near me, then I can try to touch it in order to prove that the object is, or is not, real. From this discussion, MacDonald concludes that ...
A) this proves that physical objects exist.
B) dreams and illusions are basically the same kind of phenomena.
C) this is logically impossible in a dream.
D) dreams cannot be used to foretell the future.

Question

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MacDonald concludes that checking perceptions to determine their veridicality is logically impossible in a dream, as the procedures for verifying reality cannot be applied in the dream state.

MacDonald Tells Us, "There Are Procedures for Determining Whether Any