sub iexpectanarraycontainingdataaboutaccuracy{

 my $arrayref = shift;

## todo:  not ideal example
## also align 0/9 with degugging levels
 print {STDOUT} $arrayref->[0]," is quite accurate\n"

 print {STDOUT} $arrayref->[9]," is deeply inaccurate\n"

 return 1;

}