A topic is a territory, a question is a direction, a thesis is a destination. Climb the three rungs below: pick a topic, choose the question that actually has competing answers, then choose the sentence an informed reader could dispute. The needle on the right shows where each candidate lands between nobody disagrees and nobody could settle it — and at the bottom you can run the same test on a sentence of your own.
Your ladder so far
TopicTerritory — not chosen yet
QuestionDirection — locked until you pick a topic
ThesisDestination — locked until you pick a question
Rung 1 Pick a territory
Rung 2 Which one is a real question?
Rung 3 Which answer is a thesis?
Picks used: 0. A clean climb takes two.
The reasonable-disagreement meter
No one disagreesArguable & decidableUndecidable
Start on the leftEvery sentence you click gets diagnosed here. The green band is the only place a thesis can live: disputable by an informed reader, but decidable by evidence you could actually put on the page in eight pages.
Now test a sentence of your own
Type a candidate thesis — from a real assignment if you have one — and the checker will name what is stopping it from being arguable, quote the words that trip it, and give you the next move.