Definitions containing the term the x that can be y is not the true x

What does the x that can be y is not the true x mean?

B	Be Computing » Texting
DA	The Internet » Wannas
NOR	logical NOT OR Computing » Assembly
ISKUR	TüRkiye Is Kurumu International » Turkish
ZA	The Internet » Wannas
CN	Can Miscellaneous » Unit Measures
MYM	Maritime & Yachting Museum of the Treasure Coast Community » Museums
WSLN	Write & Speak Like the News Community » Media
TB	To Be Computing » General
:	Such That Academic & Science » Mathematics
XA	The Sims - Electronic Arts Computing » File Extensions
IKALOPLT	I Know A Lot Of People Like That Computing » Texting
PFF	The Progress & Freedom Foundation Community » Non-Profit Organizations
TS	The Same Community » Media
IZ	Is Internet » Wannas
POST	The Washington Post Community » Media
OTJ	On The Job Business » General
SB	Should Be Community » Law
Ain't	Is Not Internet » Wannas
MB	Might Be Internet » Chat
BTW	By The Way Internet » Chat
OTC	Over The Counter Medical » Hospitals
OTC	Over The Counter Medical » Laboratory
REY	The Reynolds and Reynolds Company Business » NYSE Symbols
BAT	Be Able To .... Business » Positions

the X that can be Y is not the true X: Yet another instance of hackerdom's peculiar attraction to mystical references — a common humorous way of making exclusive statements about a class of things. The template is from the Tao te Ching: “The Tao which can be spoken of is not the true Tao.” The implication is often that the X is a mystery accessible only to the enlightened. See the trampoline entry for an example, and compare has the X nature.