Lightning Talk: What do you mean by “is”? - Duncan Jones
(1) ignition switch variable
(2) car
(3) traffic it depends
can only answer what the answer “was”
transactions: it’s bad form to lock guests in their room
Example:
distance (influences time)
business rule containing “is” do you mean - quite recently - a minute ago, 5 minutes ago - defined location (priveleged observer)