When you tell the truth, you have nothing to keep track of. The world itself becomes your memory, and if questions arise, you can always point others back to it.
As any decent defense attorney will tell you: if you're accused of something you didn't do, this is still an extremely bad approach.
Don't defence attorneys (at least in the USA) heartily recommend shutting up as opposed to lying?
Here's the new thread for posting quotes, with the usual rules: