Logical language
"Logical language" in a Sentence (3 examples)
Logical language builder Garrett Jones estimates there are at least fourteen full-blown logical conlangs, including his own Minyeva and David Madore’s amusingly named Yall (Yet Another Logical Language).
The most famous logical language is “Lojban,” an offshoot of Loglan started in 1955 by James Cooke Brown and maintained by the “Logical Language Group” since 1987.
The people who left the Loglan project in 1987 started their own logical language under the name of the Logical Language Group.