Ah, I see. So that's how it works and got one of the two endings. I'll also have to replay the game to see what the other ending is. My guess is that you get it by getting more upstreams in the 1st analysis and getting more downstreams in the 2nd one. Because when I had more upstreams in both analyses in one playthrough and the opposite in the other, the boss told me to recheck the data in the second analysis in the 1st playthrough while he told me to recheck the data in the first analysis in the 2nd playthrough.
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You got it! The analysis results determine what ending you get. If the boss doesn't tell you to re-check the data, you're on the path to the ending you're getting (with the crude drawings in the office.) To get the other ending (with the longer dream), you have to get the "recheck your data" result for both. (I think the order is "more downer" results for the first prophecy, "more upper" results for the second. Or just accept every data point, that should get you the second ending.)