Tonight, on BBC 2 There is a programme on 911 Conspiracy Theories. It will go through the conspiracies ranging from ligitimate scientific questions (why did the towers collapse so quick) to the ridiculous (were New York's Jewish Community forewarned). There are many people who believe both of the above and much more.

I don't believe the anti-Semitic one, few normal people in the UK do. That is because many of the 911 Conspiracy theorists come from the left wing, where racism is not tolerated. I also don't tolerate racism but I discount this conspiracy theory for one important reason and one reason only: no evidence exists to suggest that it is true.

Taking the former theory mentioned above, that of the behaviour of the falling tower, there are more questions to answer. That doesn't mean that I think it was all a CIA plot, that means I think some questions have been posed, by independent experts, that require answers. Answers which as yet are not fourthcoming.

I won't go deep into individual theories as a cursory Internet search will provide sites where they are explained in detail. All I will say is that questions need answers.

Question: Did any Jews die on 911?

Answer: Yes, look at the roll-call of the names of the dead, look at the official records.

Conspiracy Theory: Disproved.

Compared with...

Question: Why did the towers fall at the speed of gravity, and within their own footprint?

Answer: ????

Conspiracy: Neither proven nor disproven

So instead of jumping to conclusions and saying we have the answers, we need to have a proper investigation into the question which are out there.

Conspiracies have happened. All of us of any intelligence at all know that the evidence for WMD in Iraq was cooked up. The invasion of Iraq was a conspiracy. That is beyond doubt.

Some say people like conspiracy theories because the truth doesn't provide comfort. They of course have forgotten that not all conspiracy theorists are the same, and not all theories are the same. If the evidence for the Iraq war was faked that doesn't mean that Diana was murdered in Paris, the two are completely separate. So why talk about conspiracy theories as if they are one?

I hate the term conspiracy theory as much as I hate the term junk science. It is a term used to pour scorn on critics. We should, rather than relying on these sound bite phrases, argue about the facts.