Stress.

Piotr writes:
--> One of the points I tried to make was that stress is
not a segmental feature but an autonomous phenomenon. In
a language with initial stress the first syllable of a
word may be reduced and deleted, while stress simply
finds a new syllable to anchor to. In Slavic, final yers
were weakened and lost even if originally stressed, and
stress was retracted from them to the preceding syllable.
<--

Piotr will slap me around where I'm wrong, or misusing the
nomenclature.

Consider:
A blackbird cage
and
A black birdcage

In spoken Modern English, the only feature that separates these
'minimal pairs' is stress. Then, Piotr, can we say stress is
*phonemic* in English? (if phonemic is not the term, then what is
it?).