dafyomi2711
They don’t mean literary kol hatorah kula,
did he write a sefer Torah?
Was he mekayem michiyas amalek? zechiras amalek?
Was he mikayem sipur yetziyas Mitzrayim?
At any rate your statement “he studied the same torah we have nowadays! the same gemara the same chumash” Cannot be correct, as you conceded in your second comment “chumash must have been a little different”