The phrase "also either" is correct and usable in written English.
It is typically used when you want to indicate that two options both apply. For example: "You can have steak, also either chicken or fish."
Yet this fact is also either unknown or unappreciated.
The images that Pettibon draws are also either borrowed or look like they are.
The Crown Prince's regional strategy has also either stalled or backfired, too.
Most of her neighbors' homes are also either damaged or destroyed due to wind and flooding.
The other girls were also either former Kennedy campaign aides or secretaries.
Most solvents, except chlorinated hydrocarbons, are also either flammable or combustible.
Exodus Communications and Level 3 Communications are also either in the business or planning to enter it.
Sizzler, Chili's Grill and Bar, IHOP and Outback Steakhouse have also either hired new agencies in the last six months or are looking to do so.
Though his company is best known as a commercial developer, it has also either built or converted at least 3,000 co-op or condominium units.
Mississippi State University, Texas A&M, Roanoke College in Virginia and the University of Nebraska at Lincoln have also either just disconnected or made plans to.
The centers must also either contract with a company that provides interpreters, or hire someone whose job description would include that role.
