Defensibly flip a bot

I wanted to know if flipping a robot by defense was legal or not with curved walls so if they ram us they flip?

Is this tower takeover or VIQC

Because in TT purposefully tipping someone is illegal.
And I’m pretty sure there’s no defense in VIQC
Also I’m pretty sure curved walls wouldn’t flip them. They would also be too bulky and not viable

I’d refer you to <R3b>