#help I'm still confused on the difference between A and D

I say to try to learn it now. I felt the same way when I went through the lessons, and it wasn't until after I started on the actual logical reasoning section did I realize why there was so many lessons on translating. It's okay if you don't know it perfectly now, but it will definititely be to your benefit to be able to translate well. It'll get easier as you go through the curriculum and you see its relevance. To give some reference, I started a bit ago and am now returning to these lessons to solidify my understanding of conditional logic because it's that important. I hope this helps!