The Talmud and Geonim seem to speak about ta'am and it's ability to transfer as being a very physical process. The literature reads as if one would be able to taste the transfer of flavor from one vessel to another. The Rambam flat out says that if one isn't sure if taste transferred, one should taste the mixture and see if taste transferred.

Mishneh Torah: Ma'achalot Assurot - Chapter 15:2

What is implied? When the fat of the kidneys3 falls into beans and becomes dissolved, the beans should be tasted. If the taste of fat cannot be detected, they are permitted. If [not only] the taste, [but also] the substance of the fat is present, they are forbidden according to Scriptural Law. If the flavor could be detected, but there is no substance, they are forbidden by Rabbinic Law.

ב כיצד חלב הכליות שנפל לתוך הגריסין ונמוח הכל טועמין את הגריסין אם לא נמצא בהן טעם חלב הרי אלו מותרין ואם נמצא בהם טעם חלב והיה בהן ממשו הרי אלו אסורין מן התורה נמצא בהן טעמו ולא היה בהן ממשו הרי אלו אסורין מדברי סופרים:

However, many modern discussions do not seem to speak about ta'am in this way. I have never had a Rav suggest that I taste something to see if it's acceptable. Rather in my experience they speak about it in more of a metaphysical sense and say to just throw everything away in a case of doubt.

Their words don't seem to be discussing a real physical entity, rather it sounds more like speaking about the transfer of purity or impurity, which can only be measured in the metaphysical/spiritual realm. An example of this would be speaking about flavor transfer without asking the question whether the material absorbed flavor to begin with, or checking to see if any flavor actually transferred.

So which is it? Is ta'am a physical entity that can be measured by our tongues, or it it a metaphysical entity that we can't quantify or interact with in a physical way?

  • 2
    I've never seen anyone treat it like a metaphysical entity. What are you talking about? Taste is taste. (Why does everything have to be a every modern rabbi vs Talmud and Geonim presentation??)
    – Double AA
    Jul 17 '18 at 18:29
  • 1
    I see. Your claim that every modern discussion takes it that way is well founded.
    – Double AA
    Jul 17 '18 at 18:45
  • 1
    Can it be both?
    – robev
    Jul 17 '18 at 18:47
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    Source for these made up many modern discussions? as far as I know the rule still is that if it can't be tasted it's not a Halakhoc problem and no one has ever argued on that ever. It's not just the Rambam who says it. It's the Shulchan Arukh too. Explicitly. (And everyone else ever, also explicitly, if you'll let me slightly hyperbolize for a moment.)
    – Double AA
    Jul 17 '18 at 19:35
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    @DanF How to verify if something did impart positive flavor is a separate question. The Gemara talks about giving it to a kfeila (prob a chef of some sort) to taste.
    – Double AA
    Jul 17 '18 at 21:24

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