It has to be pretty easy to catch Shorten in a lie and then turn it back on him.
Day after day.
Week after week.
Volume 1, Volume 2 and so on.
It wouldnt take a particularly savvy PR Guru to hammer the lies home relentlessly on social media and MSM in regular bursts from now or better still in regular bursts a couple of months out from the next election.
If Shorten can lie in Parliament and lie at PR takes he certainly is broadcasting he is capable of lying to voters.