I was also asking about sources of knowledge in more general terms too. For example; if you were on a jury then you might have to make decisions based on eye witness accounts. You might have to rely on expert witnesses for things like explanations of a persons health or wha the surgical risks are in an operation. If you were diagnosed with cancer then you'd literally have to place your lives in the hands of onclologists who might have to fill your bodies with poison (i.e. chemo) to kill the cancer etc. Sometimes we must base decisions on what certain authorities say. Thus some of our knowledge will come from experts. Brick-Top just described what a virtual particle is. I assume that he learned that somewhere. Typically we learn from authoritative sources like text books, science teachers etc. You know that the sun is 93 million miles from the Sun because scientists have worked hard to figure this out. We trust that they did their job right and we trust that the system works, i.e. one scientist might lie or make a mistake but we can't imagine that they all do.
If you're married then consider whether you would have got married if you believed that your wife would cheat on you. Its impossible to know that before you say I do so, based on our knowledge and experience with this person, we trust them. That means that we assume they won't do something when we can't really know for sure that they won't. That's an example of faith too. If a man gets up to go to work then he has to assume that won't die before he gets there. That's usually true, but not always. Sometimes we have to make assumptions in life because it would be too difficult to live otherwise.
If you're married then consider whether you would have got married if you believed that your wife would cheat on you. Its impossible to know that before you say I do so, based on our knowledge and experience with this person, we trust them. That means that we assume they won't do something when we can't really know for sure that they won't. That's an example of faith too. If a man gets up to go to work then he has to assume that won't die before he gets there. That's usually true, but not always. Sometimes we have to make assumptions in life because it would be too difficult to live otherwise.
