Here is another reason why journalism should come with a licence. Journalists have been trying to convince people that brain-training exercises are not going to help them when there is a plethora of evidence to suggest that it slows cognitive degeneration in people with real problems. I don’t care whether it shows no significant effect on people with normal brain function in a small trial in one place. I do care if journalists attempt to generalise from one study without checking their facts. I am sure the scientists that did the study did not intend to do so. Perhaps a simpler solution is to either sack journalists that mislead the public or make sure all science journalism is checked by someone who knows something about science before it is published. Idiots.