"Physics" is ALL about "language and the use of words".!!
Note ANY heat ENERGY e / c^2 = EQUiVALENT mass = m*c^2.!!

What is the definition of "object" ..in GR gtr Tivity.?!!
[NO mass CAN BE deFinitively-RELATED to GR POiNT-objects.]
[There's NO mass in GR gtr Tivity RELATED to G_uv = T_uv.]

Term GR "POiNT-like" DOEs NOT mean or indicate "POiNT-mass".
[ GR "POiNT-mass" is the *ONLY* mass, in GR-gtr-Tivity.!! ]

ALL, GR POiNT-"like" mass CAN BE is "POiNT"-mass ..*ONLY*.!!
[GR POiNT-"mass" inherently CANNOT have ROCKETs attached.!!]
[GR POiNT-"mass" inherently, CANNOT *STRETCH* into a ROD.!!]

However, ANY REAL (as-suspeciously-observed)
[ GR "POiNT-mass" CANNOT BE "ripped apart" at ANY horizon.!! ]
[ "Non-POiNT mass" WiLL BE "ripped apart" at a BH horizon.!! ]
[ The GUESS "non-POiNT" mass WiLL BE "ripped apart" there.!! ]
[ "Non-POiNT mass" DOEs NOT exist ..at all, in Gtr Tivity.!! ]

There was NO CURVATURE in GR ..mass CANNOT BE RELATED to it.!!

EXCEPT GR, "language and the use of words" ADD NOMENCLATURE.!!
GRANTED, GR was "The SEMANTiC COMEDY of REDUNDANT SYNONYMs".!!
brian a m stuckless

Tom Roberts wrote:
[I repeat: this is about language and the use of words, not
really about any underlying physics.]

"Physics" is ALL about "language and the use of words", duh.!!

It's equally easy to consider the heat itself to have mass.

How?

Note ANY heat ENERGY e / c^2 = EQUiVALENT mass = m*c^2, Dimwit.!!

As I keep saying: the term mass only applies sensibly to objects.

What is the definition of "object" ..in GR gtr Tivity, DooOP.?!!

[There is NO mass ..in GR gtr Tivity, RELATED to G_uv = T_uv.!!]
[Means NO mass CAN BE deFinitively-RELATED to GR-POiNT-objects.]

Term GR "POiNT-like" DOEs NOT mean or indicate GR "POiNT-mass".
[Note GR "POiNT-mass" is the "ONLY" mass, in GR-gtr-Tivity.!!]
[ALL, GR POiNT-"like" mass CAN BE is "POiNT"-mass .."ONLY".!!]
[GR POiNT-"mass", inherently, CANNOT have ROCKETs attached.!!]

Tom Roberts