Rey Received the Highest Grade on Test #1

question 281

Multiple Choice

Rey received the highest grade on Test #1. Spencer, who is not Rey, received a grade on Test #1. So, Rey's grade is higher than Spencer's. (r: Rey; s: Spencer; t: Test #1; Gxy: x is a grade on y; Hxy: x is higher than y; Rxy: x received y)
-Which of the following propositions is an immediate (one-step) consequence in F of the given premises?

• A) Gst • Rrs • (∀y){Gyt ⊃ (∀z)[(Rzy • z≠r) ⊃ Hsy]}
• B) (∃x)(Gsx • Rxt)
• C) (∃x)(Gxt • Rsx)
• D) Gat • Rra • (∀y){Gyt ⊃ (∀z)[(Rzy • z≠r) ⊃ Hay]}
• E) Gxt • Rrx • (∀y){Ryt ⊃ (∀z)[(Gzy • z≠r) ⊃ Hxy]}

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