When the ba'al tefilah mistakenly believes there to be a valid minyan while you know there isn't (counting someone who is not yet converted or underage, for instance) and they have already started reciting kaddish, may one respond Amen Yehei Shmeh Rabba?

  • Not adding this into the question, but other possible (and vastly different) situations would be where their standards for counting a minyan may differ from normative halacha (including someone of questionable Jewish heritage, for instance...) Feb 2, 2017 at 19:35
  • The exact parameters of the case could matter as some Rishonim allowed counting a child and/or a woman as the tenth if there are 9 other men. This could create grounds for leniency.
    – Double AA
    Feb 2, 2017 at 19:37
  • @DoubleAA your comment is certainly a good starting point for an answer. I avoided specificity in this question because it could quickly become too situational/CYLOR. Feb 2, 2017 at 19:43
  • @IsaacKotlicky I'm trying to gain some clarity on the scenario. You said the "Ba'al tefillah believes..." is he saying Kaddish Shalem or Haldf Kaddish? If that's so, there is a halacha that if there was a minyan prior, then he can say Kaddish even if he knows there's no minyan, now. (I.e. minyan there for Shemoneh Esrah, no minyan after.) If you're talking about Mourner's Kaddish, shouldn't the mourner be responsible for verifying that there is a minyan?
    – DanF
    Feb 2, 2017 at 20:44


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