... subsections. Once I recall what "group" I'm looking at, ... grouping pattern helps.
**Group 1: Valid Arguments 1 & ... **: #3 **A→B→C**, #4 **A←s→B→C**, #5 ... #3 is _A→C_, #4 is _A←s→C_, and ... method) – and as such, we cannot conclude with words such as ...