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the part of mathematics that involves basic calculations such as adding or multiplying numbers

maths the part of mathematics that deals with the relationships between lines, angles, and surfaces

the mathematical study of the features that objects still have when they are twisted and stretched out of shape but not torn

the part of mathematics that studies how the angles and sides of triangles are related

gaslight

to manipulate someone psychologically so that they begin to question their own perceptions and memories

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Dunning-Kruger effect

the phenomenon by which an incompetent person is too incompetent to understand his own incompetence

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