in reply to const correctness

What does const-correctness mean in a dynamically-typed language where a read reference to a never-knowingly-mutated variable in a different context to its origin, numeric vs. string or vice versa, can cause its internal state to mutate? And is it worth giving up dynamic typing for? If so, why? What does it buy you?

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In Section Meditations