Machine for Extracting the Truth

Quick sketch for Machine for Extracting the Truth in my Moleskine pocket notebook.

My self criticism and old school art school training tell me that it's not a good drawing, and like many other rough sketches I always think I will make a better version one of these days.

But there is something honest about this sketch — the idea rendered quickly and unselfconsciously.

Would re-drawing improve the idea?

And in any case, it most likely came into being as a direct result of the subject?

Perhaps I should just accept my rather messy drawing style, and stop worrying if it is 'good' or not.