If one is unsure whether they recited Shema at all, must they recite it again?

PrayerShema

Synopsis

When a person is uncertain whether they recited Shema, they must repeat it because Shema is a Torah obligation, and all Torah-level doubts are resolved stringently. They also repeat the surrounding blessings.

Early Acharonim
Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

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