I read exactly what you meant.
But your assumption that it is the clients fault is wrong.
If they don't believe the raw data then you need to prove to them that the collection method is sound.
If they don't understand the analysis, then you need to be clear about the methodology and limit your predictions to things which can be tested for accuracy when they come about.
If it's their inbuilt predjudice or assumptions then you need to carefully challenge that by using predictions based on those assumptions that are proved wrong in the data.
(PsychoChomp, Wed 21 Nov 2012, 12:34, 2 replies, latest was 12 years ago)

Perhaps they are assuming that he is a bent spastic?

( tangledupinblue hairy badge with moving eyes, Wed 21 Nov 2012, 12:35, Reply)

We have done all of that and all other areas of that business are engaged and happy
this is historical stubborness, nothing else.
( Naked Ape call me Caitlyn, Wed 21 Nov 2012, 12:37, Reply)