![]() I imagine a reader misunderstanding the causal relationship in the sentence as currently written. I hope for this to disambiguate. I believe this point in the document describes a design decision we the reader are presently considering. The reader should not imagine that an existing capacity to change `x` itself materially /prevents/ substitution---that we cannot substitute---the way a buoy's ability to float prevents it from sinking. I believe the writer means to say that the intended goal, supporting mutation, makes us (the author + the reader) reject direct substitution as an evaluation strategy. |
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README.md |
Racket is a general-purpose programming language and an ecosystem for language-oriented programming.
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