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Question: Compare `evalb` and `is`

Question:Compare `evalb` and `is`

nguyenhuyenag 90 Maple
evalb
August 06 2020
2

Hi all, I have a question and hope to get answered.

Let

f := x + 1 = (x^2 - 1)/(x - 1);

Maple command `is(f) = true` but `evalb(f) = false`. So which case should be use `is()`, which case should be use `evalb()`? 

I think, `evalb` is used to compare numbers and `is` used to compare expression, logic. Is this true?

Thank you very much.
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