[jolmg]

> Though, understanding it this way makes the direction of the angled bracket a little odd; at least for me it's more natural to understand dup2(2, 1) as 2<1, as in make fd 2 a duplicate of fd 1, but in terms of abstract I/O semantics that would be misleading.

Since they're both just `dup2(1, 2)`, `2>&1` and `2<&1` are the same. However, yes, `2<&1` would be misleading because it looks like you're treating stderr like an input.