No. There may be more than two.
Always. Every time. Science is not valid if one can not reproduce the results. QED
A polygon with six sides is called a hexagon.
a biased sample is valid determin
In my view reliable test is always valid.
It is ALWAYS valid. If you purchased something, the bill of sale is proof of that.
A notarized document never expires. It is always a valid document.
To debug a flow chart you must start at the beginning and test all possible routes through the flow chart. At each decision point, always test both valid and invalid values. When every path leads to a valid result, the flow chart itself may be deemed valid.
"Every time" is correct. "Everytime" isn't a valid English word. In fact, all time expressions starting with "every" are always written as two words: every day, every week, every hour, etc. Be careful when writing; many people aren't aware of this spelling rule.
It's always two words - every time. "Everytime" isn't a valid English word. In fact, any time expression starting with "every" is always two words: every week, every day, every hour, and so on. Be careful! Many people aren't aware of this spelling rule so you often see non-words like "everynight" in writing that hasn't been proofread.
newtons laws are always valid in non inertial frames
Nope. Every tag doesn't require an attribute. For instance, the paragraph tag is perfectly valid without any: <p>Look how valid I am!</p>
e = Mc square is valid for every mass involved when dealing with the coloumbic part of the Theory of Relativity. It does not apply under other situations.