The Sum of All Human Knowledge.

[Johanna]

@Alessan

In other words, a collection of the sum of human knowlege already exists - it’s called humanity.

Except that the OP seems to be asking for a *representation *of this sum–not the actual knowledge base already found collectively in humanity, but an artifact, a compilation that would reproduce it in full. Similarly, you could say that the sum of all geography already exists as the earth itself; by analogy the OP would be asking for, not the earth, but a map of it that included a representation in full of every single thing on the earth.

The absurdity of such a 1:1-scale representation of everything in existence is what Borges was satirizing with his inimitable deadpan scholarliness in A Universal History of Infamy, the section headed “Of Exactitude in Science.”

…In that Empire, the craft of Cartography attained such Perfection that the Map of a Single province covered the space of an entire City, and the Map of the Empire itself an entire Province. In the course of Time, these Extensive maps were found somehow wanting, and so the College of Cartographers evolved a Map of the Empire that was of the same Scale as the Empire and that coincided with it point for point. Less attentive to the Study of Cartography, succeeding Generations came to judge a map of such Magnitude cumbersome, and, not without Irreverence, they abandoned it to the Rigours of sun and Rain. In the western Deserts, tattered Fragments of the Map are still to be found, Sheltering an occasional Beast or beggar; in the whole Nation, no other relic is left of the Discipline of Geography.