\BeginKnitrBlock{exercise}\iffalse{-91-66-97-100-32-115-99-105-101-110-116-105-102-105-99-32-112-114-97-99-116-105-99-101-93-}\fi{}<div class="exercise"><span class="exercise" id="exr:unnamed-chunk-17"><strong>(\#exr:unnamed-chunk-17)  \iffalse (Bad scientific practice) \fi{} </strong></span>This is _not_ good scientific practice! Can you think of what the problem here is?</div>\EndKnitrBlock{exercise}