Lesson 5: The logic of the Thinking Process

Entities and arrows

The Thinking Process writes thinking down as entities, complete statements about reality, connected by arrows that claim a cause-and-effect relationship. There are two kinds of arrow, and they are read differently.

Sufficiency: if… then…

Sufficiency logic says the cause is enough to produce the effect: if the cause exists, the effect follows unavoidably.

If I default on a loan repayment, then my credit rating goes down.

Sometimes one cause isn’t enough on its own. Then two or more causes are joined with an ellipse, read as “and”:

If I turn the ignition key and my car battery is dead, then my car won’t start.

Read sufficiency trees from the bottom up: if… and… then… The current reality tree, the future reality tree and the negative branch all use sufficiency logic.

Necessity: in order to… we must…

Necessity logic says the condition is needed to achieve the result: without it, the result won’t happen. But it isn’t enough on its own; other conditions are needed too.

In order to graduate, a student must pass the final exams.

Passing the exams doesn’t guarantee graduation (you might also need to pay fees and submit a project), but without it, no graduation. The conflict cloud, the prerequisite tree and the strategy and tactics tree use necessity logic.

Exercise: which kind of logic?

If the order is released late, then it is delivered late.
In order to win the tender, we must submit a compliant bid.
To be President of the United States, a person must be at least 35 years old.
If the furnace runs out of material, then the furnace stands idle.
In order to keep our key accounts, we must keep the star salesperson.

Pause and think: which statement about sufficiency logic is NOT true?

It is written “if… then…”
If the effect exists, the cause must exist
If the cause is sufficient, the effect is guaranteed
Two causes can be jointly sufficient for an effect

An effect can have other, independent causes: the car may not start because it has no fuel. Seeing the effect doesn’t prove one particular cause. That is why trees check for “additional causes”.

Challenging an arrow without challenging a person

Arguments about problems usually become arguments about people: “You’re wrong.” “You don’t understand the business.” The Thinking Process gives everyone neutral, agreed questions to ask about any arrow, called the categories of legitimate reservation (CLR):

Reservation	The question it asks
Clarity	“I don’t understand. Could you explain what you mean?”
Entity existence	“Does this statement, as written, really exist in our situation?”
Causality existence	“Does the ‘if… then…’ really make sense here?”
Cause insufficiency	“Does the effect always follow, or only under certain conditions?” The condition becomes a second cause, joined by an ellipse.
Additional cause	“Is there another significant cause of the same effect?”
Predicted effect existence	“If this cause is real, what else would we expect to see? Do we see it?”

You are not saying “you are wrong”; you are saying “this connection needs checking.” That keeps the discussion about logic, not egos.

A sales manager says a mixer grinder isn’t selling in his territory because competitors offer cheaper options. The regional head asks: “Have sales come down on all the routes?” Which reservation is that?

Clarity
Entity existence
Predicted effect existence
Additional cause

If cheaper competition were the cause, we would predict falling sales on every route where those competitors sell. If sales fell on only some routes, the claimed cause is doubtful, or something else is going on.

Check your understanding

Answer all five. Get four right to complete the lesson.

1. Which is true of necessity logic?

The condition is needed but not enough on its own
The cause guarantees the effect
It is written “if… then…”
Seeing the effect proves the cause beyond doubt

“In order to… we must…”

2. Which tool uses necessity logic?

Current reality tree
Future reality tree
Conflict cloud
Negative branch

Each arrow in a cloud reads “in order to… we must…”.

3. An ellipse joining two causes means…

Either cause is enough
The causes are in conflict with each other
The causes are the same
Both are needed together to produce the effect

Read it “if… and… then…”.

4. “Does the effect always happen when the cause exists, or only under certain conditions?” is…

Clarity
Cause insufficiency
Entity existence
Additional cause

The missing condition is added with an ellipse.

5. Why use the categories of legitimate reservation?

To win arguments
To slow meetings down
To challenge the logic, not the person
To avoid writing things down

Agreed, neutral questions keep disagreement productive.