* Hypothetical Creatures

http://scienceblogs.com/tetrapodzoology/2009/06/birds_come_first_no_they_dont.php

But, ultimately, BCF is entirely unsatisfactory: we're supposed to construct scientific hypotheses based on the evidence we have, rather than on the evidence we think there should be, and BCF is just way too speculative. It proposes the existence of a whole lineage of hypothetical creatures that are absent from the fossil record.

Naish makes it sound like there is a problem if you propose the existence of a whole lineage of hypothetical creatures that are absent from the fossil record.

But of course that is EXACTLY what the dino to bird theory does!
As I have pointed out again and again.