h0mEDw

    def before():
        x = 0.0
        x += 1.0
        for i in xrange(1000):
            x += 1e-17
        return x

    def after():
        x = 0.0
        for i in xrange(1000):
            x += 1e-17
        x += 1.0
        return x


    print before() == 1.0
    print after() == 1.0

   True
   False

  1. For x and y you cannot prove that x<=y or x=>y
  2. Every function is continuous

  - my mobile phone
  - my landline phone
  - all credit cards and bank accounts
  - all hosted email solutions
  - all other hosted ways of communication (social media, messaging apps)
  - all ways of transport unless I own the devices (and even some cars you could own have telemetry these days...)

  - The history of telephone calls, metadata (when and where [to which number] I called or when and who [what number] called me) as well as the data itself (the content of the calls themselves);
  - The history of text messages, as in the case of calls - metadata and the data itself;
  - History of data transfer (Internet), as above - metadata and the data exchanged itself;
  - Connection history - when my phone was connected to the [OPERATOR]'s network, when in [OPERATOR'S COUNTRY] or when via roaming;
  - Location history - where my phone was located, e.g. which base stations it was connected to or from which country it was connecting or any other information allowing to determine my location more accurately than "Planet Earth";
  - History of used devices - IMEI numbers as well as other data collected about my device / devices;
  - Any additional information collected about me.