The article had no mention of his rationale investing in Synta.
He also stated that: "Whenever I enter a position, I have a predetermined stop. That is the only way I can sleep. I know where I’m getting out before I get in. The position size on a trade is determined by the stop, and the stop is determined on a technical basis… I always put my stop behind some technical barrier.”
I guess SNTA hasn't reached that yet since he keeps buying.