We find as a rule the experts called upon by the parties before us file affidavits.  These affidavits are naturally drafted by the respective advocates.  So they read almost like the statement of case or counter statement depending on who has called the witness.  Instead it may be better to just get their opinion in the form of an affidavit.  This opinion will deal with the prior art, the common general knowledge, this invention and why the expert is of the opinion that it is anticipated or not, it is obvious or not.  Even when the affidavit has to counter the opinion of the other side expert, it is better merely to say that the expert disagrees with the opinion and for what reason.  Instead the affidavits contain attacks on the expertise of the experts.  This must be eschewed.  Each expert gives his opinion and the reasons therefore and the Court / Board will apply its mind and decide how relevant the evidence is for proving the case.  The experts are respected academicians in their fields and such attacks may discourage the best minds from offering to assist us. It will be then a loss to the development of IP jurisprudence. The expert evidence is one of the relevant facts which the court has to consider and while deciding the patentability of some inventions, this may be very crucial.  We hope the members of the Bar will bear this in mind, when they request experts to assist us.  Whether they appear in the witness box or file affidavits in lieu thereof, the witnesses deserve our respect.