If an argument is invalid , there is no deduction for it in the system.
He produced an invalid passport and failed to inform the officer that it was not valid.
Any philosopher can tell you this is an invalid argument.
But when they tried to claim they were told their policy - for which they had paid a monthly premium over a four-year period - was invalid .
she spent the rest of her life as an invalid
The argument is manifestly invalid as there is no way that can be derived from (a).
Second, we can try to show that the conclusion does not follow from the premises, and thus the argument is invalid , proving nothing.
It seems to default to either redrawing the menu or logging out if you select an invalid menu option, which again can be confusing if you're not in a harmless text editor.
If any invalid entries are detected, flashing arrows appear next to the input fields and a popup dialog box describes the specific problems.
The Corporation announced that an invalid SSL certificate that web sites use is required to be installed on the user computer to use the https protocol.