How does exhaustive listing interact with quirky cases?

Question

It is well known that subjective-が can have exhaustive-listing properties, implying that the sentence applies no further within the universe of discourse than the subject:

私がした。-> “I'm the one who did it”

However, how does this transfer onto a nominative object, for instance:

私はあなたが好きだ。

Can this object still have exhaustive listing function and thus mean “You're the one I love.”, and what of a dative subject:

私に分かっている。

Can this mean “I'm the one who understands it.” opposed to merely “I understand it.”?

Answer 1

私はあなたが好きだ。

The grammatical terms aside, this sentence in itself doesn't mean "you are the one I like." If you want it to mean that, you would have to stress あなた in speech.

The first が in the sentence below does have the exhaustive listing property, but its effect is on 私, of course.

私があなたが好きだ。

---

私に分かっている。

This is not a very natural sentence by itself though it may appear in a dependent clause as in:

私に分かっていることは〜だ。

As a standalone sentence, what you meant would be expressed by either:

私は分かっている。

or

私が分かっている。

This が has the exhaustive listing property as you would expect.

By the way, the following sentence sounds natural.

私に分かる。

There clearly is a hidden subject here and that thing is understandable to me. I don't think this "dative subject" thing applies here.