The speaker claimed that imagination is more valuable that imagination because it is free from constrain of established attitudes . Admittedly ,  some fields such as art value more on imagination  and imagination has brought  about magnificent progress in the realms such as physics . However , the speaker overlookd the fundamental effect of  experience in the other realms. Examples frome engineering  and politics will help to illustrate my point of view .I concede that imagination is the life of art , becaouse it raises a sense of  refreshing . People are tired of cliche . In this way we need appreciable incentives to motivate our life . A  film is usually expected avidly for a plot that challanges our mind and for images that we have never seen .  For example , the success of Hurry Port is attributed to its magic depiction of another world  . Picasso striked the world with his unconventional work that no one had ever imagine . I also concede that many of our great progress in science  are contributed to imagination and we should respect and give space for the unconventioanl ideals . When calssical physics met a dilema ,  quantum physics rouse among rejections . Though it was regarded as absurd imagination , it turned out to open a new window for us to understand the world .  In this case we should take a retrospective glace at our conventionally accepted opinions and stay open to the new ideas that seem imaginary ,Nonetheless , in other fields experience still enjoy greater value . Take an engineer for example . His proficiency is skilled by his anterior experience which finally determine his ability in his job . It is imposible that a broken complicated machine could be fixed by a person based totally on imagination. Another example is that , people tend to give support to senior candidates in politics for rich experiences make them more trustworthy . In these cases , people value more on reliability, and experice is the fundation of practise .In sum , the roles of experience and imagination differ from fields to fiels . It is unfair to stat that one is more valuable than the other .Generally , we should pay attention to both sides , and it will help us to better understand the world .