Protection is a term of art and doesn't deduce causality...

> This is pseudo-science. Please refrain from upvoting. You cannot prove (or imply) causation via observation. The only method we know to find causation is by setting up an experiment. This study however merely measures variables in a pre-existing context, without injecting independent variables. The only valid result you may extract from this is a correlation, never causation.

> Please edit the title to reflect correlation or (IMO preferred) delete the submission, because such bad science surely does not pass the quality barrier of HN.

Hmm...