A simple technique for diagramming arguments involves the use of arrows and line

Question

A simple technique for diagramming arguments involves the use of arrows and lines to graphically depict the relationships among premises, conclusions, subarguments, and main arguments. Begin a diagram by enumerating all of the statements of a given argument. Represent these statements in the diagram by placing the numeral for a particular statement within a circle. You then can indicate which statements in an argument serve as premises and which serve as conclusions by drawing an arrow from a supporting statement to the statement that it supports. Dotted lines are used to connect the conclusions of subarguments to the corresponding premises in the main argument. Indicate which argument diagram best represents the structure of the following argument. (Do not assume that the argument is a good argument.) Pay attention only to the intended inferential relationships between statements in the passage. (1) Antibiotics can be more harmful than most people realize. (2) Improper use of antibiotics can lead to resistant strains of bacteria, and (3) those resistant bacteria can cause illnesses that are more difficult to cure. This is because (4) resistant strains of bacteria cannot be cured with standard antibiotic regimens. In addition, (5) improper disposal of unused antibiotics can contaminate supplies of fresh drinking water.

Explanation / Answer

Diagram A representing the correct arguement.

Start with; 4) Resistant strains of bacteria can not be cured with standard antibiotic regime, In addition,

3) They can cause illness

2 and 5 are representing what they can cause.

(improper disposal of unused antibiotics contaminate supply of fresh drinking water)

End with conclusion; 1) antibiotics are more harmful than most people realize.

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