And so we have to at least , I think , determine that that 's not true , which would be OK , or determine that it is true , in which case we want to adjust that and then continue with  with what we 're doing. And as you say  as you point out  finding ways to then compensate for that in the front - end  also then becomes a priority for this particular test ,
Right.
and saying you don't have to do that.
Mm - hmm.