Here Is an Argument with an Unstated Premise or Conclusion

question 56

Essay

Here is an argument with an unstated premise or conclusion. Translate it into a standard-form syllogism and determine whether the reasoning is valid.
The guys must have gone home early, since none of them were at the Bear.

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Definitions:

1-Pentanamine

An organic compound, specifically an amine, with a five-carbon chain and an amino group at the first carbon.

But-1-Ene

A hydrocarbon with a formula of C4H8, featuring a double bond between the first and second carbon atoms.

Gabriel Synthesis

A method for synthesizing primary amines through the reaction of potassium phthalimide with an alkyl halide, followed by hydrolysis.

S-3-Methyloctan-1-Amine

A chemical compound with the structure derived from octane by replacing one hydrogen atom with a methyl group and one with an amino group.