The world of binary
In a computer there are thousands of what they call transistors these are either on or off. So to turn on something the transistors message has to get to the output however there are a couple of hurdles these are called gates and they are exactly the same in the computer as out of the computer. They let things through, but like real life they can also shut too. When they shut they don't let the message through but they will allow it through but they have rules...
Or gates need at least 1 source and they have 2 or more inputs.
And gates need at least all its sources and they have 2 or more