In other circumstances, adult bias focuses on student behavior, with adults relying on students complying with any seemingly arbitrary boundaries and expectations laid out by their classroom teachers and building leaders. (soundout.org)
Hence the crazily arbitrary boundary of present - day Northern Ireland — 370 miles long although Ireland is only about 100 miles across. (blog.politics.ox.ac.uk)
Viruses, meanwhile, pay little heed to such arbitrary boundaries; they prey instead on what we all have in common — our shared, human biology. (broadinstitute.org)