Between “I know” and “I have no idea” lies a lot of ground, and careful thinkers have words for every step of it. You can presume without proof, speculate with no evidence at all, find a claim plausible or dubious, hold a conviction firmly, or stay skeptical until you see the facts. These words fill the science and history passages of every reading test.
Key idea
Believing: conviction (a firm belief), tenet (a principle a group holds), presume (take as true without proof), dogmatic (sure, and closed to evidence). Weighing: plausible (seems likely), speculate (guess without evidence). Doubting: skeptical (wants proof), dubious (doubtful, or shady), cynical (distrusts people’s motives), fallacy (a mistaken belief or bad reasoning).
The ten words
Common mistake
tenet (a principle) is not tenant (a renter). skeptical is doubt about claims; cynical is distrust of people's motives.
| doubting word | what it doubts |
|---|---|
| skeptical | claims: “Show me the evidence.” |
| cynical | motives: “What’s in it for them?” |
| dubious | either; or the thing itself is shady |
tenet (a principle) and tenant (a renter) sound alike but differ: both come from ten, hold. A tenet is a belief a group holds; a tenant holds a lease. And to presume is to take something as true before checking (pre-), while to speculate is to guess with no real evidence at all.