Branch and Tick

Branch went first, because Branch's whole nature was to refuse the first easy answer.

For every clue, ask: what else could explain this? That was Branch — and Branch would not let a single obvious story stand until every other story had been checked. "The pawprint means the cat was here," Branch agreed. "But does it mean the cat ate the cookies? Let's see what else could explain an empty tin and a muddy print." And Branch laid out the branches, calm and unhurried, one possibility at a time.

Branch one: the cat ate the cookies. Branch two: the cat came in after the cookies were already gone, and the empty tin and the pawprint are two separate things that just happen to be near each other. Branch three: someone ate the cookies, opened the window to blame the cat, and the cat wandered in later. Branch four: there were never any cookies in that tin today at all.

"Four explanations," said Branch. "All of them fit what we can see. And that's the trap — the obvious one isn't wrong because it's obvious, but it isn't right just because it's first, either. We have to test them. Every branch gets checked before we trust any of them."

And this was where Tick stepped in, because the way to test a branch is against the clock.

Tick's whole nature was put every event in order on the clock; the sequence is where the answer hides. So Tick took each thing they knew and pinned it to a time. The cookies were counted full at three o'clock — Grandpa had seen them. The window was found open at five. The mud outside was dry until the four o'clock rain, so the pawprint couldn't have been made before four. And the cat — the cat had been shut in the sunroom, everyone agreed, from three until half past four, when it was let out.

"There," said Tick, laying it all on the clock in order. "Now watch what the timeline does to Branch's four stories."

So together they walked each branch across Tick's timeline, and one by one the timeline knocked them down.

Branch one — the cat ate the cookies. But the cat was locked in the sunroom until 4:30, and the pawprint couldn't exist before the 4:00 rain wet the mud, and — most telling of all — Grandpa's own note said the tin was already empty at 4:15, before the cat was ever let out. "The cat can't have eaten them," said Tick. "It wasn't even loose yet. The clock says no." Branch one fell.

Branch two and four fell too, when they checked — the tin had been full at three, and the cat print was real. But Branch three — someone ate the cookies before 4:15, then opened the window — that one survived. It broke no clock. It fit every time. And then a small quiet clue clicked into place: chocolate on the little brother's sleeve, from before lunch. "There it is," said Branch, softly. "The one that fits the timeline and the trace. Not the loud first answer. The one that survived the test."

The cat, entirely innocent, washed its paw.