shading

hello…
could you answer this question pls?

if a triangle is very small, i.e if the number of pixels in the rendered triangle is small, does it really matter whether you use flat or smooth shading for the triangle? why or why not?

if there is only one small triangle, FLAT or SMOOTH shading is not very important.
but imagine 100 small triangles, each triangle will have a different color than his neighbor …