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Many philosophers claim: "Ordinary people, when they think that they're deceived by their senses, think that they aren't perceiving material objects." Austin objects to this by pointing out

    { 1 } - that if people thought that they saw a shadow (or rainbow) or heard a voice -- and became convinced that this shadow (or rainbow or voice) wasn't a "material object" -- then they wouldn't conclude that they were deceived by their senses.
    { 2 } - that if people knew that a ship on a clear day is further away than it looks, they wouldn't conclude that they aren't perceiving a material object.
    { 3 } - both of the above.

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1 is wrong. Please try again.

Many philosophers claim: "Ordinary people, when they think that they're deceived by their senses, think that they aren't perceiving material objects." Austin objects to this by pointing out

This objection isn't relavent to the claim quoted above.

Read the claim again -- slowly and carefully.

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2 is correct!

Many philosophers claim: "Ordinary people, when they think that they're deceived by their senses, think that they aren't perceiving material objects." Austin objects to this by pointing out

    { 1 } - that if people thought that they saw a shadow (or rainbow) or heard a voice -- and became convinced that this shadow (or rainbow or voice) wasn't a "material object" -- then they wouldn't conclude that they were deceived by their senses.
    { 2 } - that if people knew that a ship on a clear day is further away than it looks, they wouldn't conclude that they aren't perceiving a material object.
    { 3 } - both of the above.

Of course, people wouldn't conclude this.

Austin adds that many things can go wrong when we're being deceived by our senses -- and just one of these is that what we think we perceive really isn't there.

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3 is wrong. Please try again.

Many philosophers claim: "Ordinary people, when they think that they're deceived by their senses, think that they aren't perceiving material objects." Austin objects to this by pointing out

    { 1 } - that if people thought that they saw a shadow (or rainbow) or heard a voice -- and became convinced that this shadow (or rainbow or voice) wasn't a "material object" -- then they wouldn't conclude that they were deceived by their senses.
    { 2 } - that if people knew that a ship on a clear day is further away than it looks, they wouldn't conclude that they aren't perceiving a material object.
    { 3 } - both of the above.

Just one is relevant to the claim.

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the end