the.com/illiteracy
The locked door to every other door, with the key sitting right outside.
means The inability to read or write, or a lack of knowledge within a specific subject area.
from From Latin illiteratus, literally not lettered — in plus literatus, marked with letters, from litera, a letter of the alphabet.
Functional kindReading the words but missing the meaning entirely.
Modern sensesNow applies to finance, computers, and emotions too.
Stubborn scaleRoughly 750 million adults still cannot read.