Evidence for the Moon creating tides

I have a friend who doesn't believe the moon causes the tides on Earth. Although I explained the science behind it, she still wants 'proof.' I have found myself stumped as to how I can prove this to her; could anyone help me prove this?

I have found myself stumped as to how I can prove this to her;

1) Find a tides table for where you live. Each country's naval office in general publishes a tides table for each day of the year. It gives you the times, during a certain day, at which the tide is high and the time it's low. This happens twice per day (two high tides, two low tides). http://en.wikipedia.org/wiki/Tide Remember that a table for a certain year isn't valid for the next year. So compare the dates (hour, day, month, year) when comparing to the Moon meridian crossing times.

2) Find a table for the rise/set times of the Moon. It usually is published for each local time. If you can't find one, you might want to use something like http://www.stellarium.org/ to help out. Remember that the Moon makes a full sidereal orbit in about 29.5 days, so it moves very little over one day (24 hours). The Moon rises about 50 minutes later each day (24 hours), because it has moved a little bit in its orbit over the time the Earth takes to complete one 24-hour rotation.

3) You should have high tides within a few minutes of the Moon passing in your meridian, which is about halfway between the time the Moon rises and the time the Moon sets.

Note that, so far, these are not *enough* to indicate that there is a correlation between tides and the Moon. (As people say in the trade, "Correlation is not causation".) In general, you do like Sherlock Holmes: you gradually find evidence that exclude every effect, and whatever you're left with should be the cause.

Anyway, the deciding factor are these:

4) You should note that the "high tides and low tides" happen during Full Moon and during New Moon. This is because the Sun also contributes to the tides. In those situations the Moon is, respectively, opposite from the Sun (during Full Moon) and on the same side of the Earth as the Sun (during New Moon).