BS”D
TIDE also includes what Rav Hirsch called “austritt”, meaning that secular knowledge is only acceptable after it is separated from and discards secular culture, values, and environment.
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Joseph, I’m 20 minutes from leaving for shul and don’t have time to check this but are you sure that R’ Hirsch ZTL meant this and not physical separation (not participating in any kehilla with Reform and setting up separate kehillas called austrittsgemeinde) by austritt? Could be both I am really pressed for time and in yom tov mode therefore relying on memory.