I like how the issue of judicial notice has changed throughout history. I know in the 1800's there were scientific studies done, and I say that in a loose way, that said that women and blacks were incompetent to testify against white males simply due to the fact that science had established that blacks and women were inferior to white males.
This type of quackery carried over into the twentieth century as many pseudo sciences were accepted as fact by the courts and used as facts in cases. It was further established down the line the flaws in all this scientific logic and showed how biased the courts could be to people.
Nowadays, things like this do not happen and this type of discrimination does not occur, at least in this way, by the courts. I just find it interesting that the way society is at a time can affect the judicial process taken by the courts and carry over all the biases and discriminatory acts and beliefs.