for which

[Tdol]

Is a 100% contraction a contraction?

[BobK]

Well OK, not really. I just wanted to draw attention to an even shorter form.

[Tdol]

Alternatives are always good.

[cleung]

Hi Tdol, you aren't picky at all. In fact, thank you very much for helping, but could you kindly explain a little more as to why the contraction at the end of a sentence doesn't work. Honestly, I have never heard about this "rule" before.

Hi BobK, thank you, too, for your help. I should have thought about dropping the "are" in the first place, or as you put it, making it disappear entirely.

[cleung]

Hi Tdol, you aren't picky at all. In fact, thank you very much for helping, but could you kindly explain a little more as to why the contraction at the end of a sentence doesn't work. Honestly, I have never heard about this "rule" before.

Hi BobK, thank you, too, for your help. I should have thought about dropping the "are" in the first place, or as you put it, making it disappear entirely

[Tdol]

OK, let's look at this:
I'm hungry, but he isn't.

When we have a phrase that is an ellipsis at the end of the sentence, we tend not to contract the positive form:
I'm not hungry, but he's.
I'm not hungry, but he is.

[dihen]

Isn't this also possible?
`
I'm hungry, but he's not.

[MikeNewYork]

Isn't this also possible?
`
I'm hungry, but he's not.

That's fine.