1- 1 So say Rodrick Wallace and Roger G. Wallace, in a paper (pdf) full of daunting mathematics and airy speculations .

2- 2 First you must cut out the airy speculation inside the brackets, then you must examine in what ways this is and is not a new kind of play, and then rephrase juvenilian, which at present totters between juvenile and some reference to that difficult writer of Roman satires, Juvenal, who may be an influence on Marston, but hardly on Shakespeare.

3- 3 He goes on to deplore the abandonment of 'subjects that really matter', and the exchange of 'solid fact' for ' airy speculation '.

4- 4 It is, perhaps, much more popular with professional scientists (as some of the Vienna positivists were themselves), who are inclined to think of philosophy as airy speculation at best, sophistry at worst, that interferes with and retards the serious work of empirical science.

5- 1 In response to Balbo's demands came airy promises from Marshal Pietro Badoglio, the Chief-of-Staff in Rome.

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