Since a pillar is needed for validity: if knowledge is one of the pillars of the shahada, and knowledge means knowing its meaning and 7 pillars, does it mean the shahada of someone who lacks this knowledge is invalid? I assume not but I'm not sure where the mistake in reasoning is baarakallahu feek

Ustadh AbdulAziz al-Haqqan

Think about it a person would know what it truly is, he won't enter islam, say this, and worship other than Allah or disbelieves in it for examlple