He heard her voice this time and let out a short sigh, turning his head briefly to look at her. "I'm still running a few tests... I won't say for sure until I know" he replied, trying to keep control over his temper. "There shouldn't be another TARDIS, it shouldn't be possible" he said, hands slamming against the console. "Unless..." he paused and started working furiously, inputting commands and instructions to the poor overworked TARDIS.
"Multi dimensional theory is more than a theory, it's a reality, the very fabric of existence has been woven with reason and connections, ties and strings. How could another TARDIS appear? It's so simple!" he shouted, bashing himself on the side of the head with his palm.