R.I.P. Scout26
Cny, think about this for a second - why is there no debate possible! That would be because you defined "new organism" the way you did. You're mistaking a tautology for a proof.
Conception is the point at which half of the dna from the father bonds with half the dna from the mother. There is no debate possible about whether or not this is the point at which a new organism is created. If you want to debate about the morality of killing this organism based on where it is in its journey to eventually becoming an adult person of value, then go right ahead, but to attempt to prop up your debate by disagreeing that a new organism is created at conception just exposes your ignorance.
What is man?