Is yoga nidra a form of yoga or not ? Ill sense in adjective is widening communication gap between scholars and common public. All streams of biological(business skill) knowledge,english-language(employment skill) knowledge and mathematical(trade skill ) knowledge are POTENTIALLY equal.Only degree of difference between three streams is in its past continuity. Mathematical knowledge is Reasoning science or Vedic knowledge which is the oldest of all three. Biological knowledge is executive(applied sciences) knowledge which is older of all three. English language knowledge is cultural(elite) science which is old of all three.