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Dear Jürgen,<br>
<br>
as you do not reveal what makes you entertain this hypothesis, I can
only speculate. Are you thinking of its diachronic side? Synthetic
causative construction originate in analytic causative constructions
by grammaticalization. As has been known since the beginnings of
research in grammaticalization, the genesis of a target construction
by grammaticalization does not automatically and instantly lead to
the disappearance of its source.<br>
<br>
Second, as has also been well known, the less grammaticalized a
causative construction is, the more it covers of the spectrum that
you call 'fully productive'. In the grammaticalization scenario, the
source construction may therefore be fully productive while the
target construction is less so. One may therefore believe that the
source becomes superfluous and disappears once the target
construction has become fully productive.<br>
<br>
To the extent that the above is reasonable, your hypothesis could
then be true for such syntactic paradigms of causative constructions
which are in a grammaticalization relationship. In other words, it
could be possible that the counterexamples which you have received
in the answers to your question concern such syntactic paradigms
which are <u>not</u> in a grammaticalization relationship.<br>
<br>
But again, this may or may not be the direction of your hypothesis.<br>
<br>
Best, Christian<br>
<div class="moz-signature">-- <br>
<p style="font-size:90%">Prof. em. Dr. Christian Lehmann<br>
Rudolfstr. 4<br>
99092 Erfurt<br>
<span style="font-variant:small-caps">Deutschland</span></p>
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