Two people wearing yellow jackets crosscountry skiing .
Two people are outside in the snow .
Two people wearing yellow jackets crosscountry skiing.
Two people are outside in the snow.
Snow is required for skiing. Snow is necessarily outside. Therefore, if they are crosscountry skiing, they are necessarily outside in the snow.
Snow is required for skiing . Snow is necessarily outside . Therefore , if they are crosscountry skiing , they are necessarily outside in the snow .