It is not exactly same, although it is similar, and most thing that is one is also other; is best if it is both free software and open source. Is not only the e

It is not exactly same, although it is similar, and most thing that is one is also other; is best if it is both free software and open source. Is not only the emphasis which differs. Open source has more specific requirements, although still sometimes they don't work; that is why you should need to be both at once. For example, GNU GPL is both a valid free software license and is also a valid open source license, so is good.