Responsa for Yevamot 67:5

ור"מ אליבא דמאן אי אליבא דרבי יהושע האמר טעה בדבר מצוה פטור אלא אליבא דרבי אליעזר

is an offence of a different character.<span class="x" onmousemove="('comment',' Lit., 'it is not from the (same) designation'. Shab. 102a, Shebu. 24b, Ker. 13b. ');">¹²</span> Whose view, however, IS R. Meir<span class="x" onmousemove="('comment',' Who, as has been shown, is represented by the Tanna of our Mishnah who admits the imposition of one prohibition upon another even where the performance of a commandment (e.g.. marriage) was intended. ');">¹³</span> following? If he follows R. Joshua.<span class="x" onmousemove="('comment',' Who is at variance on a similar question with R. Eliezer (Shab. 1370). Both R. Joshua and R. Eliezer were R. Meir's teachers. ');">¹⁴</span>

Teshuvot Maharam