That's not the central dogma; it's the misinterpretation of what the central dogma states, which I pointed out in my above comment.
Please follow the link I gave in my earlier comment. I'll quote the pertinent section here for you:
The Central Dogma: "Once information has got into protein it can't get out again".
Here's a follow-up article by Crick, from 1970 (which he wrote in response to repeated misinterpretations of what he'd originally stated):
http://www.dna.caltech.edu/courses/cs191/paperscs191/CrickCe...