The Book of Jubilees mentions the Tower of Babble’s height as being 5,433 cubits and 2 palms, or 2,484 m (8,150 ft) … .
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Babbling due to lack of oxygen probably was not a factor. But if it would have risen to over 5000 meters then the brain does start to function differently.
Quite possibly the inadequate quality of air in the Gazan jihadi tunnels promoted the Sinwar-syndromes of incoherent thought and poor tactical executions.