Misunderstanding The Brain In A Vat Scenario

The the idea that one could be a brain in a vat is one that is sometimes misapplied, as if the legitimate possibility that my body might be a mere brain floating in a vat means that there might not be an external world.  Not only does the latter, even if it was possible, not follow in any way from the former, but if I am a brain in a vat, being stimulated by electrodes into perceiving stimuli that do not exist outside of my perceptions, then an external world still exists.  Many seem to overlook this crucial point.  Only one's perceptions of particular stimuli would be inaccurate.

For there to be a brain, a vat, electrodes, and any other piece of equipment relevant to this scenario, matter has to exist.  Thus, the brain in a vat hypothesis can never be legitimately used to argue that the material world itself is an illusion, for only one's perceptions of the material world can be misaligned with reality.  At most, the brain in a vat hypothesis can only prove that the external world might have a different layout and appearance than those one perceives.

As long as one feels physical sensations, it is impossible for there to be no such thing as matter [1].  Seeing a thing proves only that one sees it.  Hearing a thing proves only that one hears it.  Touching a thing proves that some sort of physical stimulus exists, as a consciousness, being immaterial, cannot experience physical sensations without inhabiting a physical body that contacts actual matter.

The brain in a vat hypothesis, unverifiable and unfalsifiable, can change nothing about base reality even if it is true.  Truth, logic, my consciousness, my body, an external world beyond my body, and time all still exist--with the brain in a vat concept only holding ramifications for the metaphysics of my body and the world of matter outside of it.  The core of reality would still be the same.

Logic, people.  It is very helpful.

(My college classes resume today.  I will try to keep writing frequently, but there may be a drop in post frequency for a brief time after today.)

[1].  https://thechristianrationalist.blogspot.com/2018/08/matter-is-not-an-illusion.html