Letter section's translation work let me down big time, dunno what happened there. I always enjoyed reading things in letter-form the most
That said, this was a god pull in its own right. I still find the dialogue-heavy sections on quanta and how results create cause and effect a bit confusing, but the titular "qualia" was handled surprisingly well. The beginning's somewhat rushed and out-of-perspective / 4th wall breaking / overly monologuous vibes was reused, to a different end, when the racing thoughts slowed down with the plot and the whole universe collapsed in on itself after the theory of everything was found. I appreciate how this made Manabu and Yukari's first chance encounter just that much more nostalgic.
Regarding intertextuality, defo strong steins:gate energy on this one, as many have already pointed out. Some other series I could think off the top of my head are Madoka Magica, Land of the Lustrous, Bibliomania, Helck, Homunculus, Billy Bat and Re:Zero - all of which deal with endless possibilities, their subsequent manipulation / abuse, and the futility of it all. "The masses" might not even be aware and thankful to our "genius" MCs for what they have gone through, but they also have their own problems to deal with, in their own personal ways.
The sequence where Manabu finally realizes how she isn't the only one entitled to observe the superposition of the world and make the wave function collapse, only to attempt an even worse desperado to escape fate is some edgy 14-year-old shit - shit that I just can't stop gushing over. Yukari calling out to her on the hospital bed afterwards is so bittersweet. They "finally" being equals in terms of clairvoyance does not matter here - Manabu took the most ironic and roundabout step to pull the relationship closer, despite their parallel lines having already intersected. That step, however, enabled Mana to really see the woods for the trees, and take her blonde loli gf's death in her stride.
Qualia my purple! one and only.
