Full Idea
An objection is that structuralism fails to explain why certain mathematical patterns are unified wholes while others are not; for instance, some think that an ontological account of mathematics must explain why a triangle is not a 'random' set of points.
Gist of Idea
Structuralism must explain why a triangle is a whole, and not a random set of points
Source
Michael D. Resnik (Maths as a Science of Patterns [1997], Three.10.4)
Book Reference
Resnik,Michael D.: 'Mathematics as a Science of Patterns' [OUP 1999], p.213
A Reaction
This is an indication that we are not just saying that we recognise patterns in nature, but that we also 'see' various underlying characteristics of the patterns. The obvious suggestion is that we see meta-patterns.