Atkins built up detailed knowledge of conditions in occupied France - curfews, rationing, transport problems, police regulations - so that the agents were briefed on every detail of daily life.
And if from this you discover the reason of other things which are and occur, you have built up philosophical knowledge.
After six years of painstaking paper research by fellow historian Simon Jones, the researchers had built up detailed knowledge of the individual tragedies involved.
She built up her knowledge base in each of these areas such that she could put these together in a combination.
Of course, you should have built up good knowledge about the companies and sector you are interested in beforehand so you are less likely to ask anyone questions that highlight your ignorance!
"We have built up knowledge with the ATV on some technologies that are on the leading edge, and it would be quite a pity if we just stopped after all the time and money we have invested these technologies," Nico Dettmann, who runs Esa's ATV programme, told me.
"We have built up knowledge about the situation and we want to share that knowledge with the president," said Dr Jibrin Ibrahim, a campaign member and civil society activist in the capital, Abuja.
The dog built up and maintained knowledge of the nouns over a 32-month period.
"I have worked with him for more than seven years and in that time he has built up knowledge of football matters, which will hold him in good stead for the future," Gill said.
Gill said of Woodward: "I have worked with him for more than seven years and in that time he has built up knowledge of football matters, which will hold him in good stead for the future".
I had zero experience in the oil exploration business but had built up a respectable knowledge of it.
