Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Udayana also known as 'Udayan¿c¿rya' (Udyanacharya, or "Master Udayana) lived in the 10th century, in Mithila, near present day Darbhanga, Bihar state, India. Udayana was a very important Hindu logician who attempted to reconcile the views held by the two major schools of logic out of which developed the Navya Ny¿ya ("New Ny¿ya") school of "right" reasoning, which is still recognized and followed in some regions of India.