<span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 15px; ">There seems to be some conflict in these matters.</span><div><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 15px; "><br>
</span></div><div><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 15px; ">Some say, there used not to be much machlokes, because everyone knew the correct halacha, and our current state of confusion is the result of our forgetting all that.<br>
So Eliyahu can just tell us what he remembers from before the days of forgetfulness. "A kav of dates and pomegranates in a four-amah square?<br>My teacher Achiyah asked that very question of Moshe Rabbenu, and this was Moshe's answer..."</span>
</div><div><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 15px; "><br></span></div><div><span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 15px; ">But the Ritva Eruvin 13 cites a Medrash that every Halacha taught to Moshe R on Har Sinai was taught with many reasons for opposing conclusions, Muttar and Assur, Tamei and Tahor etc. They are all legitimate and can all be ruled by any BD that sees a fit argument to support one view and dismiss the arguments of preceding BD, even though they are not a superior BD. RMBM Mamri Ch 2:1</span></div>