argument:
p1. The purpose of skiing is fun.
p2. To achieve the purpose of an activity is to be good at that activity.
p3. Garrett Russell has a lot of fun skiing.
.: c1. Garrett Russell is good at skiing.
response to requirement of skill and technique counterargument:
p4. Being 'good' at skiing requires meeting a set standard of skill and technique.
p5. My personal experience in skiing, as well as training as a ski instructor, give me authority as a judge of skill and technique
p6. Garrett Russell at least meets the requirements of being a 'good' skiier, based on my assessment from video evidence.
.: c2. Garrett Russell is a good skiier
response to counter argument challenging premise 5.:
I guess its up to you to doubt me.
.: c3. In my opinion Garrett Russell is a good skier