undeniably

"Some believe that there is undeniable evidence of UFOs."

"There is no evidence that anyone was here earlier."

"He is a student of life."

"a big strong man; Jake was tall and strong"

"I often went outside hiking during my stay in Japan."

"My sister learned to write in a very careful manner. "

"The guard blew his whistle to indicate imminent departure."

"The extent of the student's knowledge about the topic varied greatly; some students knew a lot, and others knew very little. "

"The assertion in the program code checked if the student's grade was above 70%. "

"My teacher made a statement about the importance of studying hard. "

"The teacher proved the student's essay before returning it, marking any grammar errors. "

"to prove an alibi"