labour under a misapprehension BrE
labor under a misapprehension AmE

Well, dear Rex was either lying or labouring under a misapprehension.

"You are labouring under a misapprehension, and I intend to clear it up.

There may be one or two people in the Conference of Presidents who believe that it is, but they are labouring under a misapprehension!

'You have been labouring under a misapprehension; I reckon.

I am afraid, Miss Marlow, that you have been labouring under a misapprehension.'

You are labouring under a misapprehension, Mr Posselt.

They are not yet on the table, and so those honourable Members who criticised the Commission for not having presented any tangible proposals were labouring under a misapprehension.

We are labouring under a misapprehension if we believe that the Lisbon objectives can be achieved and we can become stronger by means of national protectionism, when we cannot even withstand the relevant competition in our own area.

"But you know that both she and the law labor under a misapprehension.

"I understand now why you thought to come to me, but I fear you labor under a misapprehension."

"You labor under a misapprehension," Alisande informed him.

You are laboring under a misapprehension."

(Under the doctrine of "mutual mistake," a contract can be deemed invalid if both parties are laboring under a misapprehension that goes to its heart.)

"If you seriously think I'm going to leave you running around unhampered so that you can communicate with your ship at leisure and have them blast us to molecules, then you're laboring under a misapprehension."

To the Editor: Re "Hocus-Pocus, and a Beaker of Truffles" (May 16): Possibly, Daniel Patterson is laboring under a misapprehension when he disdains truffle oil after discovering that it is artificial.

I wrote as follows: SPIRIT OF THE TENNESSEE PRESS The editors of the Semi-Weekly Earthquake evidently labor under a misapprehension with regard to the Dallyhack railroad.