Err I wasn't shouting at anyone,if that's what you mean.When I say 3rd,6th,or 7th,I'm referring to the make-up or contents of a chord,the notes in the scale that are relevant to the chord being played.The F pwrcrd notes are F,C,F,which is 2/3 of the F triad,be it major or minor.The third note defines the chord as major or minor.The Fmaj triad is F,A,C,Fminor is F,G#,C.Since the pwrcrd is made-up of only root,5th,and octave,if you simply move the chord(shape) around,you are repeating octaves and fifths,which is generally considered wrong from a technical aspect.In the F maj scale the notes are F,G,A,A#,C,D,E,F,in Fminor the notes are F,G,G#,A#,C,C#,D#,F.The 3rd isA(mjr)or G#(minor),the 6th would be C#(minor) or D(major),the 7th D#(minor) or E(major).The numbers refer to which interval of the scale.The third note of the scale defines whether a chord is major or minor.