SpecialThreatValue

[Vinifera7]

SpecialThreatValue, what does it REALLY do. The rules.ini guide says:

SpecialThreatValue=
Can be set to '0' or '1' and determines if this unit over-rides the default threat evaluation logic when the AI makes an assessment of potential threats to itself, or when evaluating potential targets for attack. If you set this to '1', you must also set ThreatPosed=0, or the special logic does not apply as the ThreatPosed= will take precedence.

I don't really understand what that means. WW seems to put it on units completely randomly, including Tanya, SEAL, engineers, IFV, MCVs, some civilian vehicles, and the Missile Silo.

Also, not all of the units that have SpecialTheatValue=1 in the YR rules have a ThreatPosed of 0. Does anyone have any idea what the function of this elusive tag really is?