Could you please tell me the meaning of the following sentence?
Aren't this orthogonal to the main point?
Thanks a lot
It means irrelevant, not related.
Plural: Aren't these (examples, arguments) orthogonal to the main point?
Singular: Isn't this (example, argument) orthogonal to the main point?
Click here: http://catb.org/~esr/jargon/html/O/orthogonal.html