[slf4j-dev] Failing fast when multiple implementations of slf4j on the classpath?

[Robert Elliot]

I haven't had a look at the code yet, but a question on the logback  
user list made me wonder whether it might not be a good idea for SLF4J  
to fail fast with an informative error message if multiple SLF4J  
implementations are on the classpath.   I'll have a look at it if Ceki  
thinks it's a good idea, but I wanted to ask first so as not to waste  
time if its already been considered and rejected as an idea.  It may  
be that it's simply not possible to do this?