Make doubts hinge on the adjective 'true'.

Impugn concealment; or wonder how we would ever get by without it.

Point out what's not hidden.

Conspire with the reader; let him count himself in.

Enlarge groups no one wants admission to.

Sketch a type with assurance.

Use the first-person plural like a defector.

Deflect the blame for invidious comparisons onto the words used to make them.

Even 'sometimes' may be often enough, for the aphorist.