There's an entry in the FAQ at http://www.slf4j.org/faq.html#paramException asking how to parameterize a logging statement when also passing an exception. The FAQ explains that the API will automatically figure it out, as long as the last argument passed is the exception and not some other kind of object. (This would be nice to mention in the javadocs if feasible.) My question: the FAQ refers to SLF4J 1.6.0 and "the SLF4J API", but the only place I saw this actually implemented was in logback-classic (the LoggingEvent class in ch.qos.logback.classic.spi, not the LoggingEvent in org.slf4j.event). Are other implementations of the SLF4J API expected to provide the same behavior? Because the wording makes it sound like SLF4J is doing the work on behalf of the implementation, but obviously an interface class can't do that. :-) Am I just misinterpreting the FAQ? thanks, Ti