Meatpropeller

Silicones are common food additives, including use as an anti-foaming agent in frying oil. If you are trying to avoid them, you may rethink having those fries next time you are at the drive through.

They are also used almost everywhere around us... shampoos, lotions, cleaning agents, cosmetics, medical implants, electronics, lubricants, etc. It seems a few ppm improves every kind of product.

Ummm...

The avocados in stores are all Hass variety or almost identical variants (Lamb Hass). These replaced Fuerte variety avocados decades ago as they shipped better, gave more consistent yields, and the darkening skin gave consumers an additional clue to ripeness.

If you are interested in trying different varieties, there are many if you live in a growing region and have access to farmer's markets. In the US: California, Hawaii, Florida.

GPS is not unreliable, especially in the wide open ocean with clear line of sight to the whole sky.