That chart is overcomplicated.
There are 3 independent markers. A, B, and +.
Blood can have A or not, B or not, and + or not. When the body doesn’t have the marker, it will react to the marker.
So when you have notA, and get A blood, you will have a reaction.
notA blood works for everyone, A blood only for A people. A people can take any blood, notA people only notA blood.
Now do this independently for the 3 markers. AB+ people have all markers so can take any combination. notAnotBnot+ people make blood everyone can take, since there are no markers, but they can’t take any other blood with any markers.
Unfortunately we call not+ -, notAnotB O, notAB B, and AnotB A. So + we invert properly but for A and B we omit them and instead of emptystring when no marker is present we invent O, presumably for 0 markers. This obfuscates the pattern.
That chart is overcomplicated.
There are 3 independent markers. A, B, and +.
Blood can have A or not, B or not, and + or not. When the body doesn’t have the marker, it will react to the marker.
So when you have notA, and get A blood, you will have a reaction.
notA blood works for everyone, A blood only for A people. A people can take any blood, notA people only notA blood.
Now do this independently for the 3 markers. AB+ people have all markers so can take any combination. notAnotBnot+ people make blood everyone can take, since there are no markers, but they can’t take any other blood with any markers.
Unfortunately we call not+ -, notAnotB O, notAB B, and AnotB A. So + we invert properly but for A and B we omit them and instead of emptystring when no marker is present we invent O, presumably for 0 markers. This obfuscates the pattern.
Not gonna lie to you my friend, but the chart was 15 times easier to understand than your explanation, which however gave some more insight
This is not complicated? When we entered XOR or NAND or whatever gates I checked out. Give me the chart.
You’re preaching to the choir here.
The chart is for people that have never tried to sing.