how do I account for blade kerf when ripping a board in half with a table saw?

[Chris Padilla]

Yes - this last point is a vital aspect of physics that cannot be avoided.

I'm working on a thingamagig that counteracts this small, inconspicuous area of physics....

[Lee Reep]

Yes - this last point is a vital aspect of physics that cannot be avoided.

My 8th grade woodshop teacher claimed you could fix slight mistakes with the "board stretcher". But we were not allowed to use it. Heck, he never would even show it to us ... claimed we needed to learn to cut things correctly in the first place.