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)