Dan I have tried, relentlessly, but I think it's beyond my logical ability to be honest.

Assume we speak to random first (though we obv don't know it at the time)...

If I were to ask you "Is 2nd random", would you say Uu?

His answer is meaningless. Let's say for argument's sake he says Uu. We know 3rd can't be random.

We move onto 3rd, and ask him...

If I were to ask you "Are you truth", would you say Uu?

Let's assume he says Uu. Hooray! We found truth.

So, finally...

If I were to ask you "Is 1st random", would you say Uu?

Again, he says Uu. 1st is random, 2nd is therefore false.

But the language... random's answers means nothing. Truth either said yes/yes or no/no, and unfortunately for me, as far as I can see, both yes/yes and no/no make logical sense, and lead us to the same solution regarding their roles.

Probably if we hit false or truth first, then we should be able to use his answer, I haven't looked into that deep enough, but I don't want to only be able to solve it if we don't speak to random first, I need a solution that accepts we can speak to random first.

Like I say, I'm probably missing the woods for the trees. I'm too busy today to spend any real time on this. If 'rilla hasn't posted an answer by midnight (UK) then I'll put another hour in, see if I can rephrase one of the questions to get a complete solution.