For those who read cryptum, dont you agree that its impossible for the forunners to win and wipe out the precursor whent he precursors were millions of year ahead of the forunners??? Discuss, i must be hushed of my ignorance
First: Please add
to your title
Also, this thread is better suited for the ‘Fiction’ subsection 
We don’t know the specifics of the war between the Forerunners and the Precursors, but it would certainly be possible. The Forerunners could vastly outnumber their creators, for instance, or have the right motivations. The possibilities are endless.