To Socrates (Plato), knowledge is more valuable than true opinion.

 

The value of knowledge and true opinion is discussed by Socrates (Plato) through understanding how human-beings can regard beliefs, opinions and knowledge.

In Plato's Meno, there is a raised question by Socrates which is why knowledge is more valuable than mere true belief and opinion. This problem can be explained as a person may lose confidence and that opinion is part of the knowledge which makes it more valuable. Humans can be motivated by two major concerns which is one for not to be duped and one for not to lose important things or miss them and the first one relates to if truth can represent a unique thing on its own behalf over the imperial adequacy and this means that a human-being can find the way to truth valuable even if it is difficult that mere knowledge. The second one means that when a person thinks that he misses something important raises an inquiry of the value of truth and if there are valuable and not valuable truths which means that there are some truths that may not be important. The truth's intrinsic value yet shouldn't be undermined until the truth is related to goals, needs and interests and this interaction can decide the value of truth from a cognitive opinion. The truth's value is also related to the question if knowledge's value is rather more important than that of the truth. There are many cases that knowledge has real value that is bigger than its parts such as belief and opinion even if they are true and related to truth as knowledge value is gained from the value of its parts and it is intrinsically valuable when the parts are collected together, they all form the value of knowledge. From a cognitive point of view, knowledge is valued when we need to be correct but not by depending on beliefs only so valuing knowledge is totally different from valuing true opinions and there are features that can identify the knowledge value such as justification. Some authors and critics have suggested that even false opinions can be justified so justification of knowledge should be based on claims and evidences. The value of knowledge is supposed to be found through the examination of other elements of knowledge and their values; in many cases justification and evidence are needed at standard conception which makes it hard to defending knowledge value. Simple claim is not enough at some cases and a theory is needed to support the justification and explain why knowledge is higher in value than true opinions.  

In conclusion, knowledge needs justification and evidence to have its value over its elements such as true opinions and beliefs and the stronger the justification is, the more value knowledge has.