So would a 40yr old female be fit to drive or not?
“Fit to” ? Who knows – if she’s a pisshead she may be pretty “capable” on 4 pints (not far different from when she’s not been drinking)
Below the limit ? Unlikely, though depends on a few variables
How big is she
What beer did she drink
Did she eat, and when
Did she drink steadily over several hours, or shovel it in and then sit around
Regardless, if I were you I’d ask her to STOP **** DRIVING DRUNK, especially if you ride on nearby roads
(Oh, in the US – so your pints are a bit smaller. I guess the limits vary by state, and some still might even just go for walking straight ?)