We are created from atoms and cells.
Essentially we are just a sophisticated biological machine in which when one piece of matter moves or behaves in a certain way it creates a chain reaction.
A beautiful mathematical and biological orchestra of unfathomable precision.
Given enough time and resources every component that makes up our bodies and minds can be dismantled and explained through science.
So i ask again do you truly believe that you are alive?
As long as i can feel the temperature of the inhaled air and i can see how the sun rises on the sky i can tell you that i am alive, there is no question about it.