just bought the game and trying to do the first trial... the Agree and Object Button seem to do the same thing (That is on Agree i also get the "This isn't right!" graphic). Also i cant seem to enter any evidence. This is either terribly explained or bugged.
After activating hints i managed to do the trial, but without hints i would have never been able to do so. the points at which you're supposed to press the buttons were totally unintuitive to me.
Also it wasn't clear that the "this isn't right" Graphic flashing when i pressed "agree" was actually telling me that this was simply the wrong move. Maybe use a different Graphic for that instance. Or a bit more in-depth of a tutorial, with samples of how correct and incorrect actions are supposed to look like.
Now that i finished the trial thanks to cheating i understand it enough to do the rest on my own i think.