Tim Ting of Gallup Market Research Corp ,Taiwan, says it is quite possible that fewer than 50% of the electorate will vote in the referendum, which would make it invalid.
However, when the writer took the prescription to the pharmacy, he discovered that the doctor had left his name off the prescription, making it invalid.
The QuickDASH demonstrated a bidimensional structure making it invalid.
If the major 'big bang radiation' of eukaryotes [ 27] was later than sometimes supposed (perhaps only 800 1100 My ago [ 1, 34, 129]), and archaebacteria are really their sisters [ 1], archaebacteria cannot be much older, making it invalid to invoke their biogenic methane as greenhouse gas to solve the faint early sun problem and prevent Archaean global freezing [ 147, 148].
To end with Feynman's words, " if you are doing an experiment, you should report everything that you think might make it invalid - not only what you think is right about it: other causes that could possibly explain your results; and things you thought of that you've eliminated by some other experiment, and how they worked - to make sure the other fellow can tell they have been eliminated".[ 1].
Decide between the + and the - sign, as you can not have both (having both would make it a one to many "function", which would make it invalid as the same).
That makes it biased, but not necessarily invalid.
For some people "seeing is believing": Making an argument does not make it valid (or invalid).
To optimize security in data entry in this study, preinstalled "checks" were made in the EpiData, which made it impossible to enter invalid numbers not previously defined by the reviewer.
That does not render people's anxieties invalid, but it does make it awfully hard for politicians to do anything to assuage them.
But to cast him out, to make him invalid in society simply because he has scissors for hands - I mean, that's strange.
