Inmudable or inmutable and mudable or mutable?

Question

I have seen both and both are in the dictionary. Is there a difference (regional, cultural etc.) or they are completely the same? Thanks in advance.

inmudable - inmutable

Answer 1

How bizarre. From the D R A E:
mutable poco usado
mudable
inmutable
inmudable poco usado

Congratulations on finding the smoking gun proving that the powers that be in control of the Spanish language are deliberately trying to confuse us.

Yep , I noticed that, Actually, I kept seeing inmutable and mudable in the same text, first I thought it was a typo. Then I searched for them, both was there. And I searched for inmudable and mutable. Again, both was there. So I asked this to be sure. :) - culé, Dec 28, 2010

Well.. it's a little unfair to compare the degree to which 'inmudable' is less popular than 'inmutable', with 'mudable/mutable'. I don't think I've ever heard 'inmudable', whereas 'mutable' is not such a strange word at all. - bill1111, Dec 28, 2010

Also, 'mudable' is usually employed in relation to the human mind (changes of heart, beliefs, etc..) whereas 'mutable' is usually employed with things. At least that's my perception. - bill1111, Dec 28, 2010

Answer 2

I've never seen immudable in a dictionary and, as far as I know, it isn't a word.

Because it is not immudable , lorenzo :) - culé, Dec 28, 2010

I swear I'm going blind. . .I can't tell the difference between rn and m anymore either :) - lorenzo9, Dec 28, 2010

you are right, that's tricky! :) - culé, Dec 28, 2010