Well, in any developed society, yes you would expect that. It’s called honesty! I think that was the point about @Griff1315 comment. Maybe it was lost in translation. The point as you rightly state is that is was brought in from outside. Again that was the point being made. How did the authorities allow this to happen. Surely they test prison officers (most likely not!). Surely they keep visitors segregated or stopped from visiting (most likely not!). Surely they would announce actual figures for inmates and prison officials (as you say, saving face so most likely not!).
Perhaps I should have included
The wall leaping covid was in way of a joke good or bad. Sorry if you missed that one too.
As for believing Thai authorities about anything of course not that was really the point of my whole post.
They now exclude the ATK test numbers, even if they are positive. Assuming the same ratio as before (some 40%) you could add 1000 cases already. But you would still like to know the total number of tests and how they were obtained