premise: Farrukhabad gharana is one of six prominent playing styles or gharanas of North Indian tabla drums, in Hindustani classical music, and derives its name from Farrukhabad in Uttar Pradesh state. Some modern disciples of this gharana learn from the prestigious tabla organization known as Tablaniketan.
hypothesis: There are only three other prominent playing styles of North Indian tabla drums.
reason: This says there are six prominent playing styles, and I put there are only three other.  There would be five.  I think this was difficult because of the math involved.