Is “Brain damaged by Liu Bei's throw in childhood” true?
novel invention
The Records of the Three Kingdoms has no record of Liu Bei throwing Adou; the incident at Changban Slope where Liu Bei threw his son to the ground and said 'you cost me a great general' is a fictional invention of the novel.
Liu Shan
In official histories, the later ruler of Shu Han is portrayed as obedient to his father's will, feigning ignorance, or simply mediocre.