Aside from maybe "whether crime is up or down" (because of under-reporting), everything else can be objectively measured. The measurements might not fit with everyone's specific circumstance (eg. earth is warming as a whole but it's unseasonably cold where you live), but that's not a reason to throw up our hands and say "those things are actually not verifiable measurable facts within any useful definition".
Aside from maybe "whether crime is up or down" (because of under-reporting), everything else can be objectively measured. The measurements might not fit with everyone's specific circumstance (eg. earth is warming as a whole but it's unseasonably cold where you live), but that's not a reason to throw up our hands and say "those things are actually not verifiable measurable facts within any useful definition".