Statements of opinion may be viewed as "mere puff".
The law does not say that "mere puff" or "sales talk" are misrepresentations.
It was an invitation to treat, mere puff, a gimmick.
Point 4 above makes it quite clear that a mere puff will not amount to a dictum et promissum.
First, the advert was not "mere puff" as had been alleged by the company, because the deposit of £1000 in the bank evidenced seriousness.
Part of their defence was that such a statement was "mere puff" and not meant to be taken seriously.
Instead of mere puffs, the compound produced an instantaneous result.
But the words seemed to be reduced to mere puff's of air, and Shaklan's hair caught in the cracks of Tachyon's lips.
In general, parties can only sue for enforcement of valid contractual terms as opposed to representations or mere puffs.
A mere puff of vapor from the lighter, and the man bowled over.