Definitions

• Real - data reflecting a measure of the physical world at a point in time
• True - a direct conclusion of the real

Areas of interest

Physical truth - All measurable properties

• The existence of an item at a point in time
• The location of an item at a point in time (DNSSEC?)
• The orientation of an item at a point in time
• The view of an area at a point in time
• The temperature of an area at a point in time
• The topology of an area at a point of time
• The EMR of an area at a point of time

Digital truth

• The bandwidth of a device at a point in time (Witness chain)
• The communication latency between two devices at a point in time (Witness chain)

Active truth (Integration of Physical and Digital truth over time)

• A specific action took place at a point in time