Critical thinking #10

In the 10^th class of the course, we moved on to the final part of the course – evaluating arguments, looking at its strength and weaknesses, its success and failure.

The first step is to see in which area the argument lies in the table given below:

	Valid	Invalid
Sound	A	B
Unsound	C	D

If the argument lies in the region ‘A’ then it is a strong argument as it is both valid and sound. 

It is a waste to argue if the reasons are in region 'D' as it is both invalid and unsound.

We learnt that circumstantial evidence is rarely conclusive by itself.

The most reliable evidence from witnesses is a first hand account. Hearsay evidence is not as reliable.

The witness’s credentials(qualification or reputation) are important, but do not guarantee that their evidence is reliable.