A stage magician cuts his assistant in half. A skeptic would reason that some kind of visual trick is at work, that the girl has not really been chopped in two.
The climate blog-o-sphere is quite different though. Andrew Montford makes a Freedom of Information request to the Met Office asking for Sir John Houghton's emails relating to AR3. The respondent answers that they do not hold any such emails. Monty then writes a blogpost concluding "it appears that Sir John has deleted historic records".
Observation nothing - conclusion scandal.
I've tried asking "How can you be sure that he holds emails relating to AR3 ?" Needless to say Monty meets that line of questioning with a stony silence.