Plagairism

When you summarize a block of text from other work, citing the source at the end is sufficient

Copying and pasting from the Internet can be done without citing the internet page.

If you come across the phrase "era of error" and use it in your paper, you should cite it.

You don't have to quote famous proverbs because they are common knowledge.

Using a few phrases from an article and mixing them in with your own words is not plagiarism.

If you quote your best friend in an interview, you don't have to cite him/her or use quotes.

You don't have to use quotation marks when you quote an author, if you cite author's name.

If you borrow someone's idea and use it in a paper, you don't have to cite it.

George Washington's birthday is common knowledge which means you don't have to cite the source.

Song lyrics don't have to be cited.