Evolutionists are unwilling to debate creationists.
Source:
Brown, Walt. 1995. In the Beginning: Compelling Evidence for Creation
and the Flood. Phoenix, AZ: Center for Scientific Creation, 212.
http://www.creationscience.com/
Response:
The proper venue for debating scientific issues is at science
conferences and in peer-reviewed scientific journals. In such a venue,
the claims can be checked by anyone at their leisure. Creationists,
with very rare exceptions, are unwilling to debate there.
Public debates are usually set up so that the winners are determined by
public speaking ability, not by quality of material.
Debate formats, both spoken and written, usually do not allow space for
sufficient examination of points. A common tactic used by some
prominent creationists is to rattle off dozens of bits of
misinformation in rapid succession. It is impossible for the responder
to address each in the time or space allotted.
Notwithstanding the above points, there have been several debates, both
live and online.