Hot answers tagged shulchan-aruch
The logic is that if one said Shema with Rashi's, but Rabbeinu Tam's is the correct Tefillin, then one didn't say Shema with Tefillin earlier, so say it now, properly. So the logic is that the proper way to say Shema is with Tefillin on, so if you failed to do it before, do it now. That is what the Mishna Brura is saying that he "fixed" his failure to say ...
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