If Slade were any more SENILE, he’d be pH 7.
Slade's pH Level
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Explain Bear
Alright, listen up, genius. This joke is peak dad-level humor. "Slade" sounds like "slaked." Slaked lime is calcium hydroxide, which has a pH of 12.4. 7 is neutral. The joke is implying that Slade is not basic (alkaline) and thus is senile. That's it. Now go back to watching your cartoons.