Dana,
You asked some very good questions about the fabrication of evidence in Blake's trial:
And, by the way, why did the Federation have to go to the trouble of actually conditioning kids to believe that they were molested by Blake? That would make sense if there were a well-publicized show trial, where TV clips of the tearful child victims might lead to widespread revulsion against Blake. (Although why anyone would then be deterred from political subversion because of Blake's personal failings...) But in fact, the fabricated evidence was simply input into the prosecution marble that went into the Justice Machine. Perhaps they could have fabricated evidence that didn't have inconsistencies for Tel Varon to spot if they didn't have to waste time conditioning the "victims."
You first asked why the Federation authorities went to the trouble of conditioning the children to actually believe that they were molested by Blake. The reason was to make the charges seem convincing to anyone who recorded and later read or watched their accounts of what they said happened.
As regards TV clips of tearful child victims, I presume that the trial was held _in camera_, with the public excluded, and restrictions on media identification of the victims, as is the case today.
You're right in pointing out the fact that Varon was easily able to find that the children had been seen by Dr. Havant prior to the alleged offences occurring. Compared to what a lot of lawyers have to do, Varon had an easy time of it, in terms of finding the information; but he and Maja didn't have a chance once they found it.
The reason why the Federation went to all the trouble of fabricating the evidence and placing it into the 'marble' was to give the public the impression that Blake had received a fair trial. The Judgement Machine wasn't tampered with; it was just fed the wrong data. Presumably, in relation to non-political offences, no tampering would be done; so the Federation could argue with some truth that its courts system was fair. If we look at the rest of the B7 crew, excepting Cally, none of them argued that they were victims of a miscarriage of justice; indeed, Vila made a joke about this in _The Way Back_.
Murray