...Something of that irresponsible spirit of adventure which was the mainspring of all Sir Percy Blakeney's actions, must for the moment have pervaded the mind of his deadly enemy... 
Baroness Emmuska Orczy 「The Elusive Pimpernel」
...He must make no reply, no explanation; the judgment of the master must be deemed infallible, for his power is absolute and irresponsible...
Frederick Douglass 「My Bondage and My Freedom」
...They discovered that the cause of thethreatened revolution was to be found in the irresponsible good natureand kindness of the French government...
Various 「Mother Earth, Vol. 1 No. 3, May 1906」
...I refer to the irresponsible outbursts of certain ——[censored] who squeeze into "The Readers' Corner" andsputter out senseless denunciations of the magazine, itsappearance, its policies, and so on...
Various 「Astounding Stories, May, 1931」
...For thisreason it is objectionable to associate any irresponsible person in suchan undertaking...
Charles Sturt 「Expedition into Central Australia」
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