"The main problem with social science is that it is ill-defined so anyone can come up and start a new social science."1.Same goes for natural science or any type of academic discipline.
"It does not seem that obvious that using social science is a reliable way to understanding society, because, social science is not reliable nor is it useful to generalise. So how can you use something unreliable to make policies? Nuts." It depends entirely on the research methodology used, and to what extent the study is ideologically biased. Bias is a major weakness, yet 2.there are many surveys (e.g. Census) that have little if any bias. Bias or no bias, can you name any alternative way of finding out the makeup of our society today in order to know how efficiently key social institutions are functioning? Or, how to justify policy proposals?
"And as I said, market research is in decline. If you have money, big data is all the range."Big data alone is not sufficient to show what is really happening. It needs to be supplemented by qualitative data. Whilst, the market research industry may change and evolve using new methodology, but it will not go away.
http://www.sagepub.com/upm-data/43895_Epilogue.pdf"Summary: social science is subjective, most of it is unscientific and the scientific bits suffer from quality of stats.
If you are not using the scientific method to gain truths, you cannot really call yourself a science."Agreed partly, although this depends on how you define science. If you google "define science", the main definition is as follows:
"T
he intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment."
If you are ultra-orthodox to this definition of science, which understandably many are, then yes, you are right. However, if you replace the words 'physical' and 'natural' with adjectives akin to social reality, then you basically define what (proper) social science is. However, other would argue the prefix 'social' clearly states that this is different from natural science, and is more subjective. Whilst natural science seeks to find laws, social science seeks to find patterns.
Ultimately, whether you wish to call it science or not is up to you. But like it or not, the academic community call it as such. One must accept that over time, language changes in its connotation. For example, the word 'gay' originally meant 'happy', but is now mainly associated with homosexuality.
In light of this notion of language change, perhaps the meaning of the word 'science' is changing from:
"T
he intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment."
to:
"T
he intellectual and practical activity encompassing the systematic study of the structure and behaviour of the physical and natural world through observation and experiment."