Two sentences side-by-side have caused immense confusion. Congrats to anyone who can reword it clearer.
The text describes "Internal Weak Pull-Ups and Pull-Downs":
"The term weak is used because the resistance is high enough that an external driver can overpower the pull-up resistor and pull the current to near ground, producing a 0 input [to a microcontroller]. The weak pull-up is implemented as a high-resistance P-transistor and when enabled, the gate of this transistor is 0, turning it on."