Answer by Glenn Rager:
- Hold an egg in your hand.
- Drop it.
- Watch it, as it falls to the floor and breaks.
Now, try to go back in time a few seconds to when the egg was unbroken.
Try to jump to the future to when the mess has been cleaned up.
The egg remains broken on the floor.
So I guess "the present" is always your undeniable experience of "now".
Now you can clean up your mess.