[Scientific Method]

Check out this site for a DIY Coriolis demo that anyone can do to prove the effect exists:

http://www.smartereveryday.com/toiletswirl

I would be interested to see how many FE supporters actually get off their potties and go do this! Post your results below!

[markjo]

The truth is, the Coriolis Effect is nowhere nearly strong enough to affect which direction toilets swirl when they're flushed.

While the premise makes sense -- that the earth's eastward spin would cause the water in a toilet bowl to spin as well -- in reality, the force and speed at which the water enters and leaves the receptacle is much too great to be influenced by something as miniscule as a single, 360-degree turn over the span of a day. When all is said and done, the Coriolis effect plays no larger role in toilet flushes and baseball games than it does in the revolution of CDs in your stereo. The things that really determine the direction in which water leaves your toilet or sink are the shape of the bowl and the angle at which the liquid initially enters that bowl.

[LuggerSailor]

However, you can experience the Coriolis Effect directly for yourself.

1. Find a playground roundabout.

2. Climb aboard and scoot it up to as good a speed as you can.

3. Haul yourself towards the centre (noting as you do, the increase in speed of rotation due to conservation of angular momentum [/hint])

4. Attempt to kick the hub with a big swing of your foot (laughter at this point is optional but most recommended)

Repeat steps 2 - 4 scooting the roundabout in the opposite direction. Note the difference in the kick attempts.

[Mickey Mouse]

The sad part is no flat Earther will understand why they did it in a swimming pool.  They do not understand things like controls to remove outside influences.  Or why they let them sit for an entire day to try to cut out any motion left over from the filling of the pool.