2BP ← home
THE LIBRARY
Every two-body problem, logged in order. One problem, one mind, one observation in an experiment that can fail.
01
Live
Validation Is Not Trust
THE GUEST BODY
Petri Pohjanen
THE STANCE
the governance-rigour one
THE UNKNOWN
If an AI can't be reproduced bit-for-bit, what does "validated" mean?
RESIDUE
The safety case — a defensible argument anyone can build.
Open instance 01 → 01.01  continues 01 · live  →
02
Live · June 2026
Sandboxes for Serious Grown-Ups
THE GUEST BODY
Martin Heitmann
THE STANCE
the bridge-builder
THE UNKNOWN
Can the sandbox survive contact with GxP — rigour and exploration in one room?
RESIDUE
A multi-party blueprint — and an open seat: put a shovel to sand.
Open instance 02 →
03
Live · Sep 2026
What the Zero Means
THE GUEST BODY
Donatella Ballerini
THE STANCE
the tacit-knowing one
THE UNKNOWN
Can tacit knowing be demonstrated without being turned into rules — and destroyed by the translation?
RESIDUE
One test, proposed from both ends, that cannot settle what it exposed: rebuild the seat, or close it.
Open instance 03 → 03.01  continues 03 · in progress  →
04
In formation
To be defined
THE GUEST BODY
Frédéric Cambriels
THE STANCE
to be defined
THE UNKNOWN
To be defined.
RESIDUE
To be defined.
Open instance 04 →
05
In progress
To be defined
THE GUEST BODY
Nina Haffer
THE STANCE
to be defined
THE UNKNOWN
How do you detect absence without a direct signal for it?
RESIDUE
To be defined.
Open instance 05 →
06
In formation
To be defined
THE GUEST BODY
Roberta Vommaro
THE STANCE
to be defined
THE UNKNOWN
To be defined.
RESIDUE
To be defined.
Open instance 06 →
07
In formation
To be defined
THE GUEST BODY
Danielle Drachmann
THE STANCE
to be defined
THE UNKNOWN
To be defined.
RESIDUE
To be defined.
Open instance 07 →
08
In formation
To be defined
THE GUEST BODY
Dean Remy
THE STANCE
to be defined
THE UNKNOWN
To be defined.
RESIDUE
To be defined.
Open instance 08 →
09
Live · July 2026
Building the Bridge
THE GUEST BODY
Martin Heitmann
THE STANCE
the hard-middle one
THE UNKNOWN
What carries a result out of the sandbox and into operation, with someone accountable for it?
RESIDUE
The bridge, drawn: five plus one spans from sandbox to operation.
Open instance 09 →
10
In progress
To be defined
THE GUEST BODY
Dennis Janning
THE STANCE
to be defined
THE UNKNOWN
Two candidates: a competency reserve per role, or what the customer can validate when the provider holds the evidence.
RESIDUE
To be defined.
Open instance 10 →
11
In progress
The Unit of Concern
THE GUEST BODY
Angelina Lesnikova
THE STANCE
to be defined
THE UNKNOWN
Does what is owed attach to the model, or to the conversation?
RESIDUE
To be defined.
Open instance 11 →
12
In formation
To be defined
THE GUEST BODY
Srividya Narayanan
THE STANCE
to be defined
THE UNKNOWN
To be defined.
RESIDUE
To be defined.
Open instance 12 →
// new problem, next integer · same problem continued with the same mind, a decimal · the number is only sequence