Ratos à prova de coca?

http://www.independent.co.uk/news/science/mice-genetically-modified-cocaine-drug-addiction-research-lab-university-british-columbia-a7577356.html

Citando:

“That plasticity allows for the pruning of some neural pathways and the formation of others, enabling the brain to adapt and to learn.

“Ideally, we would need to find a molecule that blocks formation of a memory of a drug-induced high, while not interfering with the ability to remember important things.”

Her colleague, graduate student Andrea Globa, added: “Through genetic engineering, we hard-wired in place the synapses in the reward circuits of these mice.

“By preventing the synapses from strengthening, we prevented the mutant mice from ‘learning’ the memory of cocaine, and thus prevented them from becoming addicted.”

Vícios não são vícios, são hábitos?

http://www.dailymail.co.uk/health/article-3476425/Think-ve-got-addictive-personality-s-no-thing-Drinking-coffee-working-hard-simply-habits-expert-claims.html
Quoting:
Addictive personality? There's no such thing: Drinking too much coffee or working too hard are simply habits, expert claims

By Professor Mark Griffiths
(...)
'Life is a series of addictions and without them we die'.
This is my favourite quote in academic addiction literature and was made back in 1990 in the British Journal of Addiction by Isaac Marks.
(...)
A behaviour should not be called an addiction unless it causes significant psychological or physiological effects in a person's day-to-day life