In the Following Proof, Which Justification Is Correct for Line

question 127

Multiple Choice

In the following proof, which justification is correct for line 4? $\begin{array}{llcc} \text {(1) Mnn \( \cdot \sim \) Enr } && \text { Premise } \\ \text {(2) \( (\exists z) \sim(\mathrm{Mn} z \supset \mathrm{E} z \mathrm{r}) \supset(x) \mathrm{L} x x \) } & \text {\(/ \mathrm{Laa}\) } & \text {Premise/Conclusion } \\ \text { (3) \( \sim( \) Mnn \( -\sim \) Enr \( ) \) } && \text { \( 1 \mathrm{DN} \) } \\ \text { (4) \( \sim \) (Mnn \( \supset \) Enr) } &\\\end{array}$

• A)3 DN
• B)3 DM
• C)3 Imp
• D)1 Imp
• E)None of these answers are correct.

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Definitions:

Double-Blind Procedure

An experimental technique where both the subjects and the researchers are unaware of who has been given a specific treatment, in order to avoid any prejudice.

Case Study

A research approach that investigates a topic or individual in depth over a specified period of time.

Group Size

The number of individuals present within a social group, which can influence the group's dynamics and interactions.

Decision Time

The period during which an individual evaluates available options and chooses a course of action.