In "if (tiltsensor == LOW && pushbutton1 == HIGH && doorswitch == HIGH)", that "tiltsensor == LOW && pushbutton1 == HIGH && doorswitch == HIGH" part is VERY MUCH a "mathematical expression", and obeys quite strict precedence and order-of-evaluation rules.
As a logical expression, it is permitted to stop evaluating the expression as soon as it knows the result, which can occasionally trick new users
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Required. Rely on it. Exploit it.
a7
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