Derive the Conclusions of Each of the Following Arguments Using $\lor$

question 77

Essay

derive the conclusions of each of the following arguments using the rules of inference from section 3.2 (MP, MT, DS, HS, Add, Conj, Simp, CD).
-1. A $\lor$ (B $\lor$ C)
2. B ⊃ D
3. C ⊃ E
4. (D $\lor$ E) ⊃ (A $\lor$ C)
5. ∼A / C

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Definitions:

Indirect Expenses

Costs that are not directly traceable to a specific cost object, such as the production of goods or services.

Decentralization

The distribution of decision-making power away from a central authority within an organization to lower levels or divisions.

Controllable Costs

Expenses that management can directly or indirectly control or influence in the short term, such as supplies and advertising.

Direct Expense

Costs that can be directly traced to a specific product, service, or department.