I'm in a group currently playing in and testing the 2E rules and the difference between attribute tests and skill tests is tripping us up. For example: mnemonics says it helps on COG tests for remembering things. If I'm trying to remember if my character's training covered anything about where the weak points might be on a synth exhuman, is that COG + mnemonics? Is that Knowledge (Hardware)? Is that Perception? Is that some other skill?
Another example: REF checks specifically are called out for "Reflexes (REF) Check: Catch a thrown object, balance, avoid blinding glare, or stop yourself from falling." But when I check the write-up for the Athletics skill it notes "Athletics (SOM): Physical activity in gravity with a humanoid, uplift, or biomimicked morph, including climbing, running, swimming, gymnastics, throwing, and winged flight." So if someone threw a grenade at my character and I wanted to catch it and throw it back, it would be a REF check to catch it and an Athletics check to throw it back? Or just an Athletics check?