Is it permitted to recite a blessing over tzitzit that are valid only according to the first (lenient) opinion, against Rabbeinu Tam's standard?

Synopsis

When tzitzit meet the lenient standard (first opinion, Mechaber) but not Rabbeinu Tam's stricter requirement, the question is whether a blessing may still be recited.

Late Acharonim
Lenient
Strict
Lesser cited
Major authority

Discussion

Discussion coming soon.

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