Correlation does imply causation, it just doesn't prove it. Multiple correlations over different data sets, in the presence of an extremely plausible mechanism

Correlation does imply causation, it just doesn't prove it. Multiple correlations over different data sets, in the presence of an extremely plausible mechanism - we know for a fact what lead exposure does to developing brains - is as close as we ever really get to proving a causative link in this world.