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>Some Evidence

Obviously the studies aren't definitive, but if they were and multitasking caused me to be less intelligent and less able to focus due to "permanent physiological changes in the brain", I would consider my brain to be damaged regardless of whether it meets the literal medical definition of brain damage.

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If one is free to ignore or alter the definition of anything, then one could consider anything to be anything one wants.

But I get what you mean. We can only hope that permanent means permanent if you don't do anything to reverse it like being overweight.

There's a phrase for that. "not permanent."

There's a word for that!

Impermanent.

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