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fragile is an indispensable option in beamer presentations. However I never understood nor was able to find much information about how it got its name, which seems quite peculiar.

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    See tex.stackexchange.com/questions/4736/… Commented Apr 18, 2016 at 10:46
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    Not all slides are fragile. I've to use it with listings or verbatim contents. It means that the content is not robust enough and need to be protected.
    – Ignasi
    Commented Apr 18, 2016 at 10:51
  • From the beameruserguide: "You must also use the [fragile] option for frames that include any “fragile” text, which is any text that is not “interpreted the way text is usually interpreted by TEX.” For example, if you use a package that (locally) redefined the meaning of, say, the character &, you must use this option." Commented Apr 18, 2016 at 11:00
  • @StevenB.Segletes I see. I thought it's a Beamer specific thing.
    – xji
    Commented Apr 18, 2016 at 12:48
  • Actually I think this fragile is different from the normal "fragile" thing (i.e. the duplicate closure is wrong). This one also protect against catcode-changing, normal \protect does not.
    – user202729
    Commented May 7, 2022 at 4:59

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