If that enabled us to predict the succeeding situation with the same approximation, that is all we require, and we should say that the phenomenon had been predicted, that it is governed by the laws. ↗
Two people in a conversation amount to four people talking. The four are what one person says, what he really wanted to say, what his listener heard, and what he thought he heard. ↗
Facebook collects a lot of data from people and admits it. And it also collects data which isn't admitted. And Google does too. As for Microsoft, I don't know. But I do know that Windows has features that send data about the user. ↗