From the picture you have portrayed, you have hailed that PAP will reign supreme forever. There's no point of this conversation then.
(BTW Goh tries to highlight SDP as "one mistake". Any "Goh Meng Seng" like person back then who bothered to trace every event will list a host of things like all 3 SDP TCs going into the red, Chiam's expulsion followed by court case, another court case for defamation, quarrelling in parliament, Ling HD's gaffe including Don't Talk Cock, Chee's eating during hunger strike, missing funds and technical parts in Bt Gombak TC etc. It's things that WP thankfully did not emulate so far.)