Definition of "obtuseness" []

• Something that is obtuse (noun)

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• "Mrs. Blackwell writes her teasingly about what she calls her obtuseness, going straight ahead with her work, never knowing when she was snubbed or defeated, giving the undiluted doctrine to people without ever perceiving their frantic efforts to escape, and ignoring all the humorous features of the campaigns."
• "I do kind of feel that there's a certain obtuseness to the whole "they don't get it, people worked for six years on that" argument that is so often trotted out."
• "How far back should I go to illustrate your two year exercise in obtuseness demanding ‘proofs’ and replies to your straw man arguments re: 9/11 on the Xymphora website?"