Recently, the PTAB excluded Patent Owner expert witness testimony because during the expert’s deposition, on redirect, Patent Owner’s counsel asked leading questions.  IPR2014-01146, Paper 36, pg. 6.  The PTAB relied on Federal Rule of Evidence 611(c), and cited to McCormick on Evidence, § 6 (7th ed. 2013), which states “[a] leading question is one that suggests to the witness the answer desired by the examiner.”  Is the PTAB, in reading a cold record and applying an unforgiving reading of the rule, setting a dangerous precedent on admissible testimony?