brain with convolutions associated the knot |
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| navigate by keyword : abstract apoplexy brain cerebral challenge communication concept confusing connections convoluted dementia depression design desperate disease education eeg epilepsy function head health hemisphere hopeless human icon illness illustration intractable intricate isolated knot medical medicine migraine nervous neurology person problem seizure silhouette spasm tangled task thinking treatment trouble tumor unsolvable unsolved vector |
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| The concept of unsolvable problems, challenges |
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