[Avodah] Bittul, No Discernible Taste

[Meir Rabi]

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.

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.

But the astounding observation remains that when taste is utterly not
discernible the mixture will certainly be Kosher, irrespective of the
proportions.

R Eli Turkel wrote, I understood that RSZA meant that discernible meant
detectable by means available to chazal not necessarily taste.

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

In response to my posting

<<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
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.>>
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