Sorry if this is a very basic question but I have to clear my head.
When reading a research article, how can I identify the assumptions it makes? Can I "assume" any non referred part/sentence to be an assumption by the author? For example, if an article in the field of computer science states in the normal flow of the discussion that "micro-controllers have become the bedrock of automation systems" OR "open source operating systems are more secure than propriety operating systems", but the author does not refer to any source for his/her claims, Can I consider these sentences to be "assumptions" by the writer?
Am I right? If not, can anyone explain it to me?
The other question is that whether stating a universal truth should be considered as an assumption by the writer? e.g. "mobile phones have communications easier and more reliable".