1: You know how people think the Ruby stdlib convention of `!` for mutation conflicts with the Rails convention of `!` for exceptions?
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2: Get ready to have your mind blown.
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3/3: Both mutation and exceptions are effectful operations. `!` in Ruby conventionally means "effectful". Grand Unified Theory.
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…but then by that logic shouldn't `.save` and `.save!` both have `!`s? They are both effectful.