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Episode AP05 Introduction to logic

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(1)

Episode AP05 Introduction to logic

European section, season 1

Episode AP05 Introduction to logic

(2)

If it’s snowing then it’s cold.

Episode AP05 Introduction to logic

(3)

Converse

If it’s cold then it’s snowing.

Episode AP05 Introduction to logic

(4)

If it’s not cold then it’s not snowing.

Episode AP05 Introduction to logic

(5)

A property : a true implication

If M lays on the perpendicular bisector of AB, then the length AM is equal to the length MB.

Episode AP05 Introduction to logic

(6)

If M lays on the perpendicular bisector of AB, then the length AM is equal to the length MB.

Mmed(AB)AM = MB

Episode AP05 Introduction to logic

(7)

An equivalence

The length AM is equal to the length MB, if and only if M lays on the perpendicular

bisector of AB.

Episode AP05 Introduction to logic

(8)

The length AM is equal to the length MB, if and only if M lays on the perpendicular

bisector of AB.

Mmed (AB) ⇔ AM = MB

Episode AP05 Introduction to logic

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