Determine Whether the Following Symbolized Argument Is Valid or Invalid $\rarr$

question 67

Short Answer

Determine whether the following symbolized argument is valid or invalid.If invalid,provide a counterexample;if valid,construct a deduction.
(T v Q) $\rarr$ R
~R/ $\therefore$ ~Q

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Definitions:

Duo-servo Brakes

A type of drum brake system where each shoe acts as a servo to the other, enhancing braking efficiency, commonly found in heavier vehicles.

Self-energizing

Refers to a mechanism in brake systems where the brake shoes are designed to use the motion of the vehicle to increase the force applied to the drum, enhancing braking efficiency.

Non-servo Type Brake

A brake system where the shoes do not use the rotation of the drum to self-apply, resulting in a simpler design often used in rear brakes.

Star Wheel Adjuster

A component in drum brakes used for adjusting the distance between the brake shoes and the drum, ensuring appropriate braking tension.