I think a field sobriety test usually involves more then one test, at least if you can communicate a reasonable reason why you may fail one.
I believe they may also just look at your behaviour during the interaction.
“Couldn’t walk a straight line but mentioned a recent leg surgery”
Vs
“Couldn’t walk a straight line but believed they did, started an argument about it. Failed secondary test while continuing to insist they passed the first test”
I think a field sobriety test usually involves more then one test, at least if you can communicate a reasonable reason why you may fail one.
I believe they may also just look at your behaviour during the interaction.
“Couldn’t walk a straight line but mentioned a recent leg surgery”
Vs
“Couldn’t walk a straight line but believed they did, started an argument about it. Failed secondary test while continuing to insist they passed the first test”