troubled5

The statement is about the viability of learning all gotchas of C++, and to make a credible point on this you just need to know there exists a large number of them.

(Indeed knowing all, or merely many, of the gotchas would speak against the conjecture.)

No, the circumstantial evidence of the book title was placed along with the shallow exposition that made up the "analysis" and was found to point in the same way: towards a not very objective assessment by the author.

I mean, this is a the text where a teacher relates anecdotes of the japanese actively sabotaging their learning (answering "yes" even when they don't understand) in a positive context.

How can you subtract gravity from an orbit and end up with a circle?

If you have no gravity the particle will simply move in a straight line, and that's not a motion I would call an orbit.

Ethanol is "environment friendly" when compared to gasoline, the latter having no good environmental aspects making it a bit of a low standard to beat.

The fact that rain forests are destroyed for corn plantations is probably independent of ethanol consumption, the ethanol driven investment mostly just increasing the existing rate at which deforestation happens. Corn is not only used for ethanol after all.

He mentions a 10% error in energy conservation, so not too great.

Probably he should have done research before he started, he would have found one of the several lecture notes that tell you how to integrate orbits. They tell you that symplectic methods are great for time reversible problems.

Or he would have found one of the public codes for integrating the solar system very far into the future.