I see where he is going, however, I personally believe Q was pretty clear on what keystone was specifically. Though multiple meaning definitely seen to apply, the primary keystone is directly related to the great awakening process. It is "P" aka the "chair" Q mentions.

The pineal gland, aka the seat of the soul. Without it you can not SEE reality.

Q said:

Key = unlocks door of all doors

Stone = ability to act on information

By calcifying the key into a stone, the person's ability to see and thus act is hampered or destroyed. Think King Arthur and the sword in the stone. The "Magic Sword" Q mentions.

Why does Pope have pine cone symbolism everywhere?

What is a key used for? To open doors?

If this is the esoteric example, how does this manifest in the real world?

Q tells us.

Key = NSA (mass of Intel/info)

Stone = POTUS/patriots

So, of patriots are "calcified (think NPC)" then they can't or won't be able to act on the info we are receiving.

Remember "POTUS opened the door of all doors"

Pris has the key.

We ALL have the key. Many can not USE the key. But that's what the great awakening is for! To lift the Vail!