You can take a good look at a T-bone by sticking your head up a bull's ass, but wouldn't you rather take the butcher's word for it?
This was posted by Regennis in a previous thread and I just wanted to clarify the situation slightly:
Technically speaking, as the T-Bone cut comes from the front end of the short loin as opposed to the rear, and as such is situated a significant distance from the anus of the bull, it is highly implausible that you would be able to see the nature of the T-Bone steak by inserting any sort of optical instrument into the bull's rectum. This takes into account that we are assuming a fully transparent intestinal tract for the sake of the argument.
The only cuts you would likely be able to investigate thoroughly using the anus as a starting point would be those coming from the round, and were those particularly muscles underdeveloped then perhaps the tenderloin and top sirloin. However, were you to remove the entire digestive tract of the bull before inserting your head into the anal cavity, and were you to use your arms as a wedge to separate the short loin into two parts, you might be able to see the very tip of the T-Bone cut nestled behind the void where the small intestines would previously have rested.
Rudimentary diagram of beef cut locations
Rudimentary detail noting the path of the bovine colon
It's Friday afternoon, and I'm at work. Let it not be said that I was being productive.