trust and untrust for the same network

Is it logical when a screen OS configuration has trust and untrust for the same network?

set address "Trust" "89.111.0.0/255.255.0.0" 89.111.0.0 255.255.0.0
set address "Untrust" "89.111.0.0/255.255.0.0" 89.111.0.0 255.255.0.0

Please advise

Thanks

Loc