<span class="Apple-style-span" style="border-collapse: collapse; font-family: arial, sans-serif; font-size: 14px; "><p>Indeed, you identify the mis-understanding that drives some people to draw all the water they use for Pesach prior to Pesach since prior to Pesach it will become Battel.</p>
<p>This is the issue that HaRav Auerbach is clarifying. Afilu BeElef Lo Battel means not that it is NEVER Battel but that it is not Battel as long as it is humanly discernible BY TASTE (what other device did Chazal have at their disposal?). It must be by taste simply because that is the only value that is relevant in Halacha.</p>
<p>But the astounding observation remains that when taste is utterly not discernible the mixture will certainly be Kosher, irrespective of the proportions.</p><p>R Eli Turkel wrote, I understood that RSZA meant that discernible meant detectable by means available to chazal not necessarily taste.</p>
<p>I have trouble understanding those that disagree. If Mashehu is taken literally I am sure that with a fine enough microscope one can find chametz in everything. ie baking matzot there are chametz particles in the air from a nearby bakery in extremely small portions</p>
<p>In response to my posting</p><p><<HaRav Sh Z, explains that although Chamets during Pesach is not Battel 1:1000, nevertheless it is Battel when it is not at all discernible. This<br>means that at 1:1000 it is still discernible. Consequently 1:60 is certainly discernible. Now this is strange since 1:60 is the rule of thumb at which we assume taste is no longer discernible.>><br>
<br><br></p></span>