Strictly defined, an observable should be a measure &gt; which other people can investigate and accurately verify, a measure &gt; which describes a precise variable.
(an observable; should be; a measure &gt; which other people can investigate and accurately verify,) (a measure &gt; can investigate; other people) (other people; accurately verify; ) (a measure &gt; describes; a precise variable)
an observable a measure &gt other people a measure &gt
should be can investigate accurately verify describes
a measure &gt which other people can investigate and accurately verify,
other people
a precise variable