If only my mind existed it would have to create the concept of time but nothing can be created without time, therefore solipsism is self-defeating. Shouldn't this automatically rule out solipsism?

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    Asserting “nothing can be created without time” already contradicts your commitment to solipsism. So, no.
    – Dan Bron
    Commented Aug 30, 2018 at 11:40
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    I mean the verb "creating" is an action, therefore it implies time. I can't really create time without time. So I don't really understand why so many people say it is impossible to disprove the hypothesis.
    – user34482
    Commented Aug 30, 2018 at 11:49
  • You’ll get there. Getting caught up in the meanings of words bodes well for your career as a philosopher :)
    – Dan Bron
    Commented Aug 30, 2018 at 11:50
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    I have always wondered why there are not more people who believe in solipsism.
    – user34017
    Commented Aug 30, 2018 at 14:47
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    @puppetsock - It's a process of natural selection. They don't believe in busses, therefore they try to cross streets without looking out for busses, and... Commented Aug 30, 2018 at 22:32

5 Answers 5


Connecting solipsism with time is an interesting angle. I haven't encountered it before in the discussion of solipsism, which I take to be the view that only I exist or (more formally) :

Solipsism is the assertion according to which, from a theoretical view- point, there exists only one subject: that which I constitute myself - and according to which this "I" is "alone" and "unique." (Elliott Sober, 'Why Not Solipsism?', Philosophy and Phenomenological Research, Vol. 55, No. 3 (Sep., 1995), pp. 547-566 : 547.)

Your question appears to assume that at least something else really exists, apart from yourself, namely time : and if this is granted, then clearly solipsism is false, 'self-defeating'.

But there is no need for the solipsist to grant that time exists independently of her- or himself. All the solipsist is committed to, at most, is that s/he experiences thoughts, sensations, and so forth as if they were temporal - as if they were occurring in time.

Time for the solipsist is not something which exists in itself or which is inherent in reality as an objective dimension or feature. Time is nothing but a form under which the solipsist self-represents his or her experience. The solipsist's experience is such that s/he experiences thoughts, sensations and so forth as occurring temporally, e.g. one after another. But this only means that s/he experiences these things as if they were in time, it does not follow (on the contrary) that they actually are in time. The capacity or necessity for experiencing temporally, for imposing the form of time on experience, is simply a feature of the solipsist's cognitive apparatus.

Someone might argue that if there exists only one subject, i.e. the solipsist, then s/he could not be under the constraint of experiencing thoughts &c. as if they occurred in time. As unconstrained by anything else, because ex hypothesi there is nothing else, the 'temporal constraint' (as we might call it) could not apply. But there are two points in reply : (1) it may be simply a contingent fact that the solipsist experiences temporally, so that there is no temporal constraint but only the mere fact (which could be otherwise) that the solipsist does experience temporally. (2) Contrariwise, because the solipsist exists as the sole subject - because only the solipsist exists - it does not follow that the solipsist does not have a fixed or essential nature by virtue of which s/he necessarily experiences temporally even though time does not exist.

I am not endorsing solipsism, simply trying to show that it is not self-defeating in the way you have interestingly suggested.

Historical note

The idea of time as a human contribution to experience rather than something objective and external to human experience derives from Kant's Critique of Pure Reason (1781/ 1787), I 'Transcendental Doctrine of Elements', Part I, §II 'On Time'. But Kant was not a solipsist.

  • What about this: (1) A solipsistic mind exists. (2) The solipsistic mind creates also the laws of logic. (3) Therefore the laws of logic come after the mind. (4) The statement " A solipsistic mind exists before the laws of logic" is impossible because it goes against the law of Identity. Namely it is impossible to identify something that is outside of the laws of logic.
    – user34482
    Commented Aug 31, 2018 at 18:09
  • Hi : I don't think a solipsistic mind can create the laws of logic since this suggests that, through creation, they come into existence. But that means that now not only the solipsistic mind exists but also the laws of logic. The solipsistic mind is then not the only existent, which is contrary to solipsism. Over to you - and thanks (however the argument goes) for an unusual reply. Best - Geoffrey
    – Geoffrey Thomas
    Commented Aug 31, 2018 at 18:49
  • If I am not wrong Kant doesn't say that nothing external needs to exist, he simply states that we have no objective access to time. He even refutes metaphysical idealism, and solipsism is pretty much the same thing.
    – user34482
    Commented Sep 8, 2018 at 11:27
  • You said: Time is nothing but a form under which the solipsist self-represents his or her experience. It's interesting to notice that it is impossible to create a statement without using a verb (i.e an action) that implies time and therefore space. The mind does, the mind represents, the mind exists. I still find it self-defeating. Anyhow, I'll ask you another question: How can something finite exist without having been created? Finite in what?
    – user34482
    Commented Sep 8, 2018 at 11:45
  • I did not say and do not believe that for Kant 'nothing external needs to exist' : he posits the noumenal world in his two-world metaphysic.
    – Geoffrey Thomas
    Commented Sep 8, 2018 at 11:57

If anything creates the Universe (my mind, my cat's mind, God, whatever), then that thing had to create time in some form, and according to your reasoning that would require time. Therefore, your argument isn't limited to solipsism, but covers many other philosophical and religious ideas.


If only my mind existed it would have to create the concept of time

You would have to create your own experience of time, yes. That's kinda what the idea of svabhava, substance, is. One problem with substantial persons, according to Indian Buddhism, is that we don't seem to be in complete control of things. I might infer that I am not substantial and did not create myself.

Buddhist philosophers have spent a lot time clarifying the nature of impermanent time, too, and often, not always, say that elements of cognition must have substance if they are to appear and disappear, in time. If they're right, then your solution to the problem of other minds is defective because time is just how it is. Not everything is created.


The question is grounded in a false assumption that creation require time. Time cannot exist without creation and vise versa.

Experientially, time is a measure of continuous change in the observed world.

Empirically, time is relative to the speed of matter in motion. From a scientific theory worldview, time began at the big bang and stops in a black hole. They are woven from the same fabric of space-time.

So regardless of how the observed world was created, it was done in such a way that renders the question incoherent.


I have a simple and different argument. I call it the "Location of mind argument"

My argument is against especially the "Metaphysical solipsism" the most strict form.

Lets start with the definition of solipsim to make it clear:

Metaphysical solipsism is the variety of idealism which asserts that nothing exists externally to this one mind, and since this mind is the whole of reality then the "external world" was never anything more than an idea. Everyting else are the figments of the mind. It can also be expressed by the assertion "there is nothing external to these present experiences", in other words, no reality exists beyond whatever is presently being sensed. The aforementioned definition of solipsism entails the non-existence of anything presently unperceived including the external world, causation, other minds (including God's mind or a subconscious mind), the past or future, and a subject of experience.


So I simply want to ask the owner of this argument or philosophy, the solipsist individual or any other person who is willing to explain this theory witin a solipsist perspective.

Can you locate where mind is?

  • If yes please point it in your body
    • If you show your brain as the location of the mind then you must agree that brain exists outside the mind.
      • If you agree that your brain exist then you have to agree that your body must exist in complete form at least to carry your brain.
        • If you agree that your body exist in a physical complete form then there is a solid possibility that other physical forms can exist at least.
          • If other forms can exist then the theory"solipsism" it self is refuted

Most possible location of the mind: Can science prove or provide evidence that the brain is the source of the mind

  • If no how you are so sure that you have a mind 100 %. How can you completely beleive in anything that you can not know where it is? So, what is your evidence that you have a mind? How do you know it exist?
    • If you are not sure that you have a mind how do you assert that your mind exsists?
      • If your mind does not exist, then nothing is left for existance and you do not exist.
        • If you do not exist you can not be a solipsist or anyting

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