Well, you can follow the methodologies perfectly but based upon
an incorrect hypothesis end up with an incorrect conclusion.
Well.. not 100% incorrect but rather... misleading. Happens all
of the time. Perfect math. Perfect methodology. Proper
procedures. Still wrong yet also scientifically valid. Always
best to proceed with both eyes and ears open as it were, no
matter who is telling you something. == This is my favorite
graphic for that. For me personally, I shoot for "High Accuracy,
Low precision". It gets near enough to the target. But often you
find people (not just in the sciences but in other fields as
well), THINKING they've hit high accuracy, high precision, but
they really hit LOW accuracy, high precision.