(I realize this article is very light but its is an interesting point of departure...) So are all the 'positive thinkers' correct? Is life but a giant breadth

(I realize this article is very light but its is an interesting point of departure...) So are all the 'positive thinkers' correct? Is life but a giant breadth-first search where we strive for some optimum to only remember the last path we took? I'd be willing to give up some memories to bring Dad back. [Pathos apparently gets downmodded - interesting].