I have tried to spar with a B. Jujitsu practioner and has indeed proven this. He tried many times to knock me down and he just could not get a hold on me. I simply blended with him and he always end up in the mat. He asked me numerous times did you trip me? I said no. On the ground with the B Jujitsu on top of me ( We started with me lying down) I was able to do both IKKYO and NIKKYO on one of the hands holding me down. Once I have done this I just rolled over still holding his hand. We ended up with me in the kneeling position while the guy is on the floor still PINNED.
Not even gonna bother sugar coating it, but I don't believe you. Sorry.