Oggers:
"Deep ocean tides on Earth don't exist"
"I don't understand when factors are too small to matter"
"I can't estimate the size of physical quantities and effects"
Tourist:
"I can't use a library or a search engine"
"I have difficulty comprehending the statement 'By including unnecessary terms in the gravity, and ignoring the larger degree of ignorance about the density profile, and lift effects, it's not very helpful to the discussion about falling objects.'"
Thanks for the ongoing valuable and voluminous contributions, chaps. No doubt we'll be having more.