Do verbal slip ups reveal what your really thinking?

In the UK, The Prime Minister has called for, an immediate ceasefire in Gaza and a return of the sausages.

He's not the first to muddle his words, during the Brexit debate politicians often slipped up and called it breakfast.

As for Trump, Biden and Co I'm sure you can list others. But are these just harmless trips of the tongue or do they really expose what a person is thinking of?
Do verbal slip ups reveal what your really thinking?
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I suppose it's like when you slap a guy during sex because he uses the wrong name then you realise you gave him a false one.
Do verbal slip ups reveal what your really thinking?
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