null comparative
Definition - Making a comparison without stating what it is you are comparing the thing to.

Example -

(1) Our pizzas taste better. (Better that what?)
(2) My board game contains 50% more. (More what?)

Note: Advertisers often do this. The intention seems to be to mislead, but that's just a guess. Honest writers state the basis of the comparison, e.g. My board game contains 50% more etymology than Monopoly.

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