But the cutoff is obviously not "continent"/"not continent", but rather "takes up more than half the world" versus "doesn't take up more than half the world" - possibly with an additional constraint of a sufficiently simple shoreline...
"Continent" vs. "island" is an arbitrary line, a matter of definition. Whereas smaller/bigger than half the world is precise and objective.
Here's the new thread for posting quotes, with the usual rules: