I suspect the algorithm is just the frontloaded questions they ask you -- of course they can shrink all that down into a handful of bytes and unpack it on the o

I suspect the algorithm is just the frontloaded questions they ask you -- of course they can shrink all that down into a handful of bytes and unpack it on the other end as "car crash, 3 people, injuries reported, lat/long". So the percentage "works", in a way, until you get to the freeform text.