One verse

Srimad Bhagavatam 7.15.58

7.15.58

आबाधितोऽपि ह्याभासो यथा वस्तुतया स्मृत: । दुर्घटत्वादैन्द्रियकं तद्वदर्थविकल्पितम् ॥ ५८ ॥

abadhito ’pi hy abhaso yatha vastutaya smrtah durghatatvad aindriyakam tadvad artha-vikalpitam

abadhitah
rejected
api
although
hi
certainly
abhasah
a reflection
yatha
as
vastutaya
a form of reality
smrtah
accepted
durghatatvat
because of being very difficult to prove the reality
aindriyakam
knowledge derived from the senses
tadvat
similarly
artha
reality
vikalpitam
speculated or doubtful.

Although one may consider the reflection of the sun from a mirror to be false, it has its factual existence. Accordingly, to prove by speculative knowledge that there is no reality would be extremely difficult.