People are pretty fallible in these cases, too, literally. Look at the number of fatalities in canyons with well marked paths and fences.
For each encounter with a precipice, I would strongly guess the success probably is > 99.999.
People are pretty fallible in these cases, too, literally. Look at the number of fatalities in canyons with well marked paths and fences.
For each encounter with a precipice, I would strongly guess the success probably is > 99.999.