part of the balance sheet, i think one has to be careful to also add, i can remember it was alan orton gordon kent tyt you actually want, he made a useful denominator. you can either make that denominator like a like t value of gdp. you can even more narrowly make it a net present value of all revenues under current law. but i think if you're going to do one of these things were like oh, on the left-hand side of my balance sheet in red i have this really big scary number. i think if you want to make that have economic meaning then you have to talk about what's on the right-hand side of balance sheet, which is a a whole lot of output. taxable income, or potentially taxable income. >> can you solve the problem by showing the net, the liability? >> did you get to like physical gaps calculation basically. >> i think kent was showing a net number. there is a really hard problem on communicative these issues i think. i'm pretty sure i don't know what $67 trillion means. $67 trillion come like i just kind of shut down and didn't really worry about it. >> what if i tell you if i stacked about