I called the river. Lost to KJo.

Thanks for the comments. I have lately been struggling with when to lay down a hand on the river (especially HU) in a big pot. My reasoning is such that I almost never fold in this situation, and that result bothers me. In particular, I reason as follows: 12 BB pot; I need to win only 1 in 12, or more than 8.3% of the time; I can almost never "know" in SS that I will lose 91.7% of the time in this situation; therefore, I call.

Do I have a leak here?