Talk:Lehmann–Scheffé theorem

Proof
In the proof of this theorem, don't we need that there is only one function of a sufficient statistic that is an unbiased estimator? I am referring to Lemma 1.2 on page 79 of Lehmann's Theory of Point Estimation book, first edition. — Preceding unsigned comment added by Speegled (talk • contribs) 18:00, 27 February 2018 (UTC)