@bob_calder Thought it intersting that yes it can show effective tching on one test but its the measure that matters. total #smackdown
In reply to https://twitter.com/i/status/25935136352636928
@bob_calder Thought it intersting that yes it can show effective tching on one test but its the measure that matters. total #smackdown
By Greg McVerry · Permalink · Original tweet
