Back to the direct realism problematique, this time c/o ChatGPT.
What are the strongest arguments against indirect realism?
The strongest objections to indirect realism come from several different philosophical traditions (analytic philosophy, phenomenology, and some forms of direct realism). They usually try to show that the theory either creates unnecessary entities, fails to explain perception, or leads to skepticism about the external world.
Here are the main arguments.
1. The “Veil of Perception” Problem
This is the most famous objection.
If indirect realism is true:
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We directly perceive mental representations.
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External objects are known only indirectly through those representations.
But then a problem arises:
How do we ever know our representations correspond to the real world?
Since we never perceive the world directly, we cannot compare:
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the representation
with -
the object itself.
So critics argue the theory leads to radical skepticism.
This line of criticism is associated with philosophers such as:
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Thomas Reid
Reid argued that representational theories place a “veil” between mind and world, making knowledge of reality impossible.
2. The Infinite Regress Problem
If perception works like this:
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I perceive a mental representation.
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That representation represents an external object.
Then critics ask:
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How do I perceive the representation itself?
If I need another representation to perceive the first one, we get an infinite regress of representations representing representations.
Many philosophers think perception must stop somewhere — and that stopping point should be direct contact with the world.
3. The Problem of Identifying Objects
Indirect realism says we only perceive sense-data or mental content.
But then:
How do we know which external object causes those representations?
Example:
You see a red apple.
But if what you perceive is only a mental image, you have no direct access to the apple itself. So how can you identify that the representation corresponds to that particular object?
Critics argue indirect realism cannot explain how perception successfully picks out real objects in the environment.
4. The Argument from Ordinary Experience
Many philosophers argue indirect realism misdescribes our experience.
When we look at a tree:
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We experience the tree, not a mental image of the tree.
The idea that we see internal sense-data feels artificial.
This criticism is strongly associated with:
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G. E. Moore
Moore argued that common sense tells us:
We directly perceive external objects.
Philosophical theories shouldn’t contradict such basic facts without overwhelming evidence.
5. The Hallucination Argument Can Be Reversed
Indirect realism relies heavily on hallucinations.
But critics argue this reasoning is flawed.
Just because hallucinations occur does not mean normal perception is the same kind of mental event.
Instead, critics propose:
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Hallucination is a defective case of perception, not evidence about normal perception.
This view is common among modern disjunctivists.
Key defenders include:
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John McDowell
Disjunctivism says:
In genuine perception, we are directly aware of the world.
In hallucination, we are not — even if the experiences feel similar.
So the shared “mental object” assumption may be false.
6. Neuroscience Doesn’t Prove Indirect Realism
Some philosophers argue the brain-processing story is misunderstood.
Even if perception involves neural processing, it doesn’t follow that we perceive representations instead of objects.
Instead, the brain may simply be the mechanism enabling direct perception of the world.
This objection targets the modern “scientific image” argument.
7. Phenomenology: The World Is Given Directly
Phenomenologists argue that perception is fundamentally world-directed.
When we see something:
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our awareness is of the object itself, not a mental intermediary.
This critique is associated with thinkers like:
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Maurice Merleau-Ponty
He argued that perception is an embodied engagement with the world, not internal picture-viewing.
The Core Objection in One Sentence
Critics say indirect realism:
Solves the problem of illusion by introducing mental intermediaries, but those intermediaries create deeper epistemological problems.
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