(∃X)[Px • (∃Y)(Qy • Y=x)] ⊃ (∃X)(Px • Qx)

question 25

Multiple Choice

(∃x) [Px • (∃y) (Qy • y=x) ] ⊃ (∃x) (Px • Qx)
-Consider assuming '(∃x) [Px • (∃y) (Qy • y=x) ]' for a conditional proof of the above logical truth. Which
Of the following propositions is a legitimate second step in that proof?

• A) (∃y)(Qy • y=x)
• B) Px • (Qx • x=x)
• C) Pg • (∃y)(Qy • y=g)]
• D) Px • (∃y)(Qy • y=x)
• E) Assume '(∃x)(Px • Qx)' for a nested indirect proof.

---

Definitions:

Variability

The degree to which data points in a set differ from each other and from the average, often used to measure the consistency or predictability of a process.

Engineering Drawings

Technical drawings and specifications that detail the design, dimensions, and construction of an object or system.

Specifications

Detailed descriptions of the requirements, dimensions, materials, and other properties that a product, material, or service must meet.

Toyota Production System

A manufacturing methodology developed by Toyota that emphasizes efficiency and continuous improvement, focusing on just-in-time production and quality management.