Circulatory × Cerebral

Substance meets stage. The Cerebral brings the work; the Circulatory delivers it.

Where it works

• The Cerebral makes the Circulatory's energy stand for something durable.
• The Circulatory drags the Cerebral into rooms they would otherwise never enter.
• Each finds the other's metabolism interesting rather than threatening, at least in good years.

Where it grates

• Pace. The Cerebral wants to think; the Circulatory wants to move.
• Depth. The Circulatory will simplify what the Cerebral wanted nuanced; the Cerebral will complicate what the Circulatory wanted shipped.
• Audience. One performs in private, the other in public, and they disagree about which is real.

The Cerebral wants the question; the Circulatory wants the answer, fast and loud.

At work

Public intellectuals, journalists with a thesis, founder pairs where one builds the model and the other sells it. Avoid: long quiet research projects with no public surface.

In love

Sparkling early; sustainable when the Cerebral accepts that visibility is a real form of work and the Circulatory accepts that depth is, too.

As parents

Children get an unusual education — exposure plus ideas — provided neither parent is so absorbed in their own register that the child becomes scenery.

As friends

The reliable arrangement: the Cerebral writes the talk, the Circulatory hosts the dinner that follows it.

A scene

Halfway through dinner she stops mid-sentence, says 'wait, is that *true*?', and they spend the rest of the night ruining the evening for everyone else by being right.

Examples

• Steve Jobs. Circulatory primary — triangular build, tapered face, florid reactivity, persuasion-by-presence. Cerebral secondary in the design discipline and the editing-down of every product. The keynote is the C; the typography is the B. The earlier site listed him under Cerebral-Muscular; that was a category error — he was the impresario, not the engineer.
• Carl Sagan. The canonical communicating researcher of the twentieth century. Genuine depth, genuine on-camera presence; both worked because both were real.