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  "body": "\n## Summary\n\nThe singular simplicial set $\\operatorname{Sing} X$ of a topological space $X$ is a simplicial set.\nIts $n$-simplices are the continuous maps from the standard topological $n$-simplex into $X$.\nIt turns a space into combinatorial data without losing its weak homotopy type.\nIts chains give singular homology, and it is a Kan complex, so its simplicial homotopy groups are the homotopy groups of $X$.\n\n## Explanations\n\n### L1 human\n\nLook at all the ways of drawing a point, a path, a triangle, a tetrahedron, and so on, inside a space $X$.\nThe drawings may be crumpled or collapsed; they only have to be continuous.\nRestricting a drawn triangle to one of its edges gives a drawn path, and this is the face operation.\nThe collection of all these drawings, with the face and degeneracy operations, is $\\operatorname{Sing} X$.\nWhen $X$ is a single point, there is exactly one drawing in each dimension.\n",
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