All disparity:
underscore _ (95 0x5f) vs. logicalnot ¬ (172 0xac)
The top 25 disparities between the original kerning and Autokern's kerning, in descending order.
Original
The original kerning from the input.
underscore (0x5F) lsb: 20.0
underscore (0x5F) rsb: 20.0
underscore (0x5F) right x-extrema: 206.0
underscore (0x5F) x-advance: 226
logicalnot (0xAC) lsb: 80.0
logicalnot (0xAC) rsb: 80.0
underscore (0xAC) right x-extrema: 640.0
Original kerning value: 0.000 em
Original kerned x-advance: 0.226 em
Original x-extrema offset: 0.100 em
Original in-ascender x-extrema overlap: None
Autokern
underscore (0x5F) lsb: 9.0
underscore (0x5F) rsb: 8.0
underscore (0x5F) right x-extrema: 195.0
underscore (0x5F) x-advance: 203
logicalnot (0xAC) lsb: 10.0
logicalnot (0xAC) rsb: 26.0
underscore (0xAC) right x-extrema: 570.0
Autokern kerning value: -0.453 em
Autokern kerned x-advance: -0.250 em
Autokern x-extrema overlap: 0.435 em
Autokern in-ascender x-extrema overlap: None