Rose mused for a moment over the thought and figured if the Doctor said that Astronauts would win then clearly that mean they'd win. After all he had the truth telling serum in him, so he couldn't be lying. Of course... One good slag to the head from the club of a caveman and their space suit would be shattered.

"Really? Astronauts would win?" Shaking her head lightly she wondered if that was all it took why all the civil chaos. Why even bother with the truth serum if one person said it then that'd be that.

"Cavemen would win." Just like that. Truth from Rose's mouth to the Doctor's ears and it completely contradicted what the Doctor said.

"Ohh... that's bad yeah?"