The knowledge that isn’t written#

several labs, one set of papers#

In the early 1960s, several physics labs tried to build a TEA laser from the published literature alone. The papers were not wrong, not incomplete in any way a referee would have flagged, and not withheld.

what actually predicted success#

Harry Collins, studying the attempts, found success correlated with one thing: contact, direct or one step removed, with a lab that already had a working laser. Papers travelled freely. The ability to build the thing they described did not.

never on the record to begin with#

This is the sharpest version of tacit knowledge the course will use: not a capability that was lost, but one that was never on the record to begin with. There is no rupture point in this week’s diagram, because nothing here ever broke.

discussion#

• If the papers weren’t wrong, incomplete, or withheld, what exactly did they lack?
• What did “contact with a working lab” supply that the paper itself couldn’t?
• Is there a skill you have that you could not fully hand to a stranger in writing?
• If some knowledge is tacit by its nature — never fully write-downable — is “we should have documented it better” ever a complete answer to a lost capability?

activity: write the unwritable instructions#

Setup (5 min). Pick a skill you have that you could not fully hand to a stranger in writing — tying a specific knot, a debugging habit, a way of reading a room.

Pairs (20 min). Write instructions for it in five minutes. Trade with a partner and try to follow each other’s instructions literally. Note the exact line where it breaks down.

Share-back (15 min). One breakdown per pair, read aloud.

debrief#

Compare what went missing across the room’s instructions against what Collins found missing from the laser papers. Group the misses into kinds: a physical calibration nobody thinks to state, a judgement call, a corrective for when it goes slightly wrong.

wrap-up#

Some knowledge was never on the record to begin with — the gap here isn’t a documentation failure, it’s a different kind of thing than a document can hold. Week 3 flips this failure around: a record that is complete and still doesn’t transfer. Week 4 gives you a case built to test today’s open question directly.