Willett: Lopez and Simmons, a married couple, have both been offered jobs at Evritech Corporation.
Conclusion
Their decision to reveal their marriage is foolish.
Intermediate Conclusion (since)
It will mean that one of them has a job offer withdrawn.
Evidence (after all)
Evritech has a rule against hiring more than one member of the same family.
They could easily keep their marriage secret initially and then later informing Evritech that they got married; there's no policy of terminating one of two employees who marry each other.
Evaluate
Whenever we read Main Conclusion or Role, we look for "upside down arguments", where the conclusion happens before the supporting the evidence, since more than 80% of the arguments on these two question types are structured that way.
In particular, ~65% are a Pivot / Rebuttal claim ~25% are the First Sentence
The first sentence is factual. The second sentence describes someone else's idea or action (they decided to reveal their marriage). Usually, this would be followed by a Pivot + Pushback, and that's exactly what we get when we see, "Their decision is foolish, however".
We would immediately suspect that this claim is the conclusion, and only need verification that it gets supported.
It does. The following clause starts with SINCE, which means we're supporting the 'foolish' claim.
Goal
We just want to find a match for . You could potentially reword that as, "They shouldn't reveal their marriage" or something like that.